Ellard U.S.A. Thimbles  
   Offers a variety of American porcelain thimbles.
   http://www.pe.net/~ellardus/

Kit's Antique & Collectible  
   Selling antique and collectible thimbles, other sewing items, thimble-related books, and the Thimblescope magnifier.
   http://www.thimblescope.com

Just a Thimbleful  
   Specializing in fine bone china thimbles made to order.
   http://members.ozemail.com.au/~donwells/

Thimbles and Bitz  
   Sells old and new thimbles in silver and Wedgwood Jasperware, various other thimbles, collectables, and silver jewellery.
   http://www.thimbles-n-bitz.co.uk

SewManyBits  
   Antique and collectable thimbles and sewing tools including reference books and past sewing auction catalogues.
   http://www.sewmanybits.co.uk/