Gretchen Rossi's Se.4 reunion show, cavalli dress, Where to buy it?

Does anyone know where to buy the hibicus roberto cavalli dress that gretchen was wearing on the reunion show? i know that it was in episode 1 when jena had the trunk show, but does anyone know if it was avaiable to the public? at barneys pehaps?
does anyone knows where to buy it?

also here is a blog link for it: http://www.bravofan.com/jay-photoglou-pays-me-a-visit/

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Tagged as: barneys, episode 1, gretchen, hibicus, jay photoglou, jena, reunion show, roberto cavalli, roberto cavalli dress, trunk show