Where can I find a dress like this?

Does anyone know where I can find a less expensive version like this? I am getting married this Dec. (yay!) I would love a dress similar to this one but of course I can not afford Emilio Pucci. It doesn't have to have the embellishments. Long sleeves, backless, sheath, those are the attributes I am looking for. Hope someone can help.
Here is the dress....

These are the closest styles i could find:

http://www.brides.com/fashion/dresses/gallery/wedding_dresses/vendor/detail/179490?f=118%3a120&offset=16

http://www.brides.com/fashion/dresses/gallery/wedding_dresses/editorspick/detail/164962?f=118%3a120&offset=16

http://www.brides.com/fashion/dresses/gallery/wedding_dresses/editorspick/detail/8453?f=118%3a120&offset=22

http://www.jcrew.com/AST/Browse/WeddingParties/Wedding_Bride/gowns/PRDOVR~89158/89158.jsp

I would also check out the rest of the jcrew bridal line, as well as nicole miller bridal. The kinda have that same vibe i think.

Hope this has helped. That general style seems to be kinda high-fashion, which means $$$$.

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