I would also like to recommend rebeccarode.com. I got my dress from there about 6 months ago, saved a fortune ( it was far less than a half of the UK price) and got it at least 3 months quicker than a shop here had quoted!
I tried the dress on in a local shop, then ordered it on line. I really can't praise them highly enough. They have a wide range of dresses, and if you cant see what you want on line it may well be worth contacting them to see if they can get it.
Also
http://www3.bridesave.com/search/ind...arch&dept_id=2
has a useful search engine to find what is available in the type of style you like, I have no idea what their service is like though. But nice for browsing and whiling away those weddingy moments.
Louise xxx