Try Angels in London, they do all those sorts of things, the place is massive, they have so much stuff and its either rentable or buyable.

Girls Or Teens Regency Gown $22.50

BUTTERICK Renaissance Regency era Gown Costume PATTERN $7.99

Custom Regency Jane Austen Pelisse Emma day dress gown $124.99

c.1820 Antique Regency Satin Gown w Provenance ~Study $107.50

Beautiful True Pattern Regency Ball Gown SZ 4 6 8 10 12 $10.00

Flattering Edwardian or Regency Ball Gown SZ 2 4 6 8 10 $10.00

Simplicity 4055 Jane Austen Regency Gown Costumes 14-20 $9.19

~~Afternoon Tea Gown~~Regency Era Dress/Jane Austen $50.00

Regency Era Dress/Jane Austen Gown!!!!!!!!! $50.00

BUTTERICK Renaissance Regency era Gown Costume PATTERN $7.99

Empire gown PATTERN 6630 Austen Regency Vanity Fair era $6.99

Empire gown PATTERN Austen book Regency style 6630 $6.99

1804 - 1812 Regency Gown Pattern $16.00 Sizes 6-18 all included in one envelope. Regency gown pattern, designed after the styles of the early 1800s and particularly appropriate for 1812 impressions and 1804 Lewis & Clark interpreters! Sizes 6-18 all included in one envelope. Illustrated instructions make construction easy. Options for long sleeves, short sleeves, undersleeves and wide or narrow skirt. Pattern supplement available for la...

Empire Dress Pattern $16.00 This high-waisted dress known today as "empire" was worn in the period following the French Revolution in the late 1700s. The revealing style, requiring few undergarments, reflected a desire to return to simpler, classical Grecian dress after the excesses of the European nobility. Narrow bodice is gathered into a skirt that is slim in front and full in back. The optional full-length train and slee...

1780s Chemise Dress or Chemise De La Reine Pattern $31.00 1780s Chemise Dress or chemise de la reine. This pattern for lady's chemise dress popular from 1783 until 1793 based on extant and pictorial examples. busts 28"-50". When in 1783 Marie Antoinette adopted the simple muslin dresses worn by creole women in the French Caribbean colonies, she started a revolution she may one day have come to regret. The Chemise Dress (or chemise de la reine) is the fir...

These are the sites that show up for 18th century sewing patterns. I can't go through all of them but please note that they make suggestions at the bottom for other sites to look into.

Sewing, Patterns and Fabrics Page updated November 5, 2008 ... The Recollections of J.P. Ryan: Exquisite 18th-century Patterns! ...
www.sensibility.com/links/sewinglinks.htm - Cached - SimilarPatterns from the Past: Related Sites
La Fleur de Lyse: French Medieval and 18th century patterns. Ladies Treasure of Costume and Fashion: original sewing patterns from vintage magazine - you ...
www.oldpatterns.com/links.html - Cached - SimilarThe Costumer's Manifesto Pattern Links Page
Sewing Patterns and clothing patterns from e-SewingPatterns.com .... Historical Polish Patterns 16th-18th Century · By My Own Hand - cutting diagrams for ...
www.costumes.org/ADVICE/1pages/pattern_links.htm - Cached - SimilarThe Costumer's Manifesto: 18th Century Costume Resources Online
Textiles, Sewing and Needlework. Fabrics. Lace. Embroidery. Patterns. Reproduction Clothing & Reenactors. Fun Stuff. Costume Movies. Dolls. 18th Century ...
www.costumes.org/history/100pages/18thlinks.htm - Cached

Show more results from www.costumes.orgHELP! 18th Century Patterns
18th Century Patterns. By Karen Sorkness. Sewing 18th-century garments can be a real challenge. Since I started in reenacting I've sewn a few items for both ...
www.nwta.com/couriers/7-96/patterns.html - Cached - SimilarSimplicity Patterns - Simplicity 4092 - Simplicity Sewing Patterns ...
Sewing Patterns, Pattern Review, Sewing Classes, Sewing Machines and ... Pattern Description: Simplicity 4092 Misses Costumes - 18th century costumes. ...
sewing.patternreview.com/.../patterns/sewingpatterns.pl?patternid... - Cached - SimilarVintage Sewing Links from Vintage Victorian
Illustrated catalog of vintage sewing patterns, hoop skirts, ... Has a vast collection of costume from the early 18th century through the 20th century. ...
www.vintagevictorian.com/links_sewing.html - Cached - SimilarCostume Sewing Patterns
A mail order company that supplies 18th and 19th century reproductions for living history including yard goods and sewing patterns. ...
sewing.about.com/.../costumepatterns/Sewing_Costume_Patterns.htm - Cached - SimilarSewing Patterns : Simplicity Patterns : Misses Costume - 18th ...
Misses 18th Century Costume. $10.75. Suggested Retail Price: $17.95. International Sizing · Sizing Help. Size: KK (8,10,12,14), U5 (16 18 20 22 24) ...
www.simplicity.com/p-1954-costumes.aspx - Cached18th century Clothing Sources
A Guide to Assembling a Woman's Basic 18th Century Wardrobe" - by Mara ... Offering an extensive line of sewing patterns, books, cloak clasps, kilt pins, ...
www.englishcountrydancing.org/sources.html - Cached -

SimilarSearches related to 18th century sewing patterns
18th century costume patterns
18th century knitting patterns
18th century dress patterns
19th century sewing patterns
18th century fabric renaissance sewing patterns
18th century fabrics
18th century hats

Woman's Chemise Pattern $11.25 Woman's Chemise Pattern. 18th century. Primary undergarment. Gathered neckline and underarm gussets. Multi-sized 8 to 20 inclusive....

A Lady's Chemise Pattern $18.00 For hundreds of years, a chemise was that intimate garment worn next to a lady's skin and was often meticulously monogrammed in dainty script during the Victorian era. Today, A Lady's Chemise is the perfect nightgown or simple summer dress. Our flattering chemise was worn during the mid to late 1800s and we offer two appealing versions. Both views have short gathered and ruffled cap sleeves and ca...

1780s Chemise Dress or Chemise De La Reine Pattern $31.00 1780s Chemise Dress or chemise de la reine. This pattern for lady's chemise dress popular from 1783 until 1793 based on extant and pictorial examples. busts 28"-50". When in 1783 Marie Antoinette adopted the simple muslin dresses worn by creole women in the French Caribbean colonies, she started a revolution she may one day have come to regret. The Chemise Dress (or chemise de la reine) is the fir...

If you are good at sewing, Wal_mart has those patterns, they are not too hard to sew.

Also this website has lots of it: http://www.regencyreproductions.com/regency_gown.htm

Some ebay seller has it too.

Custom Regency Jane Austen Pelisse Emma day dress gown $124.99

Simplicity 4055 Jane Austen Regency Gown Costumes 14-20 $9.19

~~Afternoon Tea Gown~~Regency Era Dress/Jane Austen $50.00

Regency Era Dress/Jane Austen Gown!!!!!!!!! $50.00

Jane AUSTEN~Cotton~& VELVET~RENN Faire~GOWN~4 pc~S-M $275.00

1804 - 1812 Regency Gown Pattern $16.00 Sizes 6-18 all included in one envelope. Regency gown pattern, designed after the styles of the early 1800s and particularly appropriate for 1812 impressions and 1804 Lewis & Clark interpreters! Sizes 6-18 all included in one envelope. Illustrated instructions make construction easy. Options for long sleeves, short sleeves, undersleeves and wide or narrow skirt. Pattern supplement available for la...

Empire Dress Pattern $16.00 This high-waisted dress known today as "empire" was worn in the period following the French Revolution in the late 1700s. The revealing style, requiring few undergarments, reflected a desire to return to simpler, classical Grecian dress after the excesses of the European nobility. Narrow bodice is gathered into a skirt that is slim in front and full in back. The optional full-length train and slee...