A few of my favorite places to get my fabric for your gowns:
DenverFabrics.com -Http://www.denverfabrics.com
Fabric for fashion, dancewear, costumes, rug hooking, crafts and home decor. Many silk, wool, and linen designer fabrics. Prices often at or below wholesale fabric pricing. Also sewing notions, trims, books and patterns at discount.
Fabric.com - http://www.fabric.com
Many discounted fashion and home decor fabric at a discount price.
Ebay.com - http://www.ebay.com
Everything and anything in this giant flea market!