They have some relatively inexpensive dresses that could function as traditional wedding dresses, such as the Sophia Silk Long Dress for $295...
or the Silk Tricotine Rebecca Long Dress for $350.
Or there's the Antiqued Gold Sequin Dress which is more expensive ($595) but could be worn for a lifetime of parties!
Or you could go the Indie designer, hand-crafted route like Kristina over at Lovely Morning.
Or like this one made from a vintage sheet [insert swoon], also featured on Lovely Morning: