I found these and hope they have something you like!
I found some really nice in their site;=)
And here´s a site called Dress Braw
And this site has some really beautiful ones - Maggie Sottero:
And if you, like me, like the show "Say yes to the dress" there´s Kleinfeld, who have sooo many dresses to choose from;=)
If you want to marry medieval style, here you go:
Or more "gothic" style: http://romanticthreads.com/
So, there you go! I so hope you find something nice and it would be so nice if you showed us your wedding photo afterwards;=)