Relics 
Dealer offers a variety of sewing items including thimbles, Full size and toy sewing machines, tools, and sewing trade cards.
http://www.tias.com/stores/relics/The Button Cottage 
Buys and sells Battersea Buttons. Interesting designs in pewter, bronze and sterling silver.
http://www.thebuttoncottage.com/
O'gosh Buttons 
Vintage, antique and collectible clothing buttons. Large clear pictures with printable worksheets for organizing a button collection.
http://www.ohgosh-buttons.com/
L. Nichols Vintage Glass Buttons 
Offers glass buttons for the London couture house of the fifties by maker's daughter.
http://www.nicholsbuttons.co.uk/
All Dress Forms 
Miniature dress forms and mannequins and accessory displays from 9 to 18-inch heights.
http://www.alldressforms.com/
Vintage Cat 
Vintage items include sewing, doll clothing, embroidery and other needlework patterns, plus fashion magazines and reference books.
http://www.vintagecat.com/