Dress - Monique Lhuiller/Carolyn Bessette knock off

I have tried three places now are suppossed to carry, according to the designer, the Monique Lhuiller line and the Romona Keveza dress that was fashioned after Carolyn Bessette's but all three places did not have the dresses I have seen in magazines that I like - any suggestions?

If I bring the pics of the dresses to Kleinfelds, do you think I can view the actual dresses or will I get the run around again -was trying to avoid Kleinfelds but having no luck elsewhere.....