Need Atelier Aimee Or Justina McCaffrey

I am totally in love with two designers: Atelier Aimee and Justina McCaffrey. I especially like Theo by JM, and pretty much any gown by AA. However, those gowns are way over my budget. I am size 0-2 in regular clothes, and I would really appreciate if anyone knows where I can buy those gowns at a discount (used once are okay as well.) Maybe you know of someone who is selling her gown. Thank you for helping me to find my dream gown. My e-mail is lenazhuk@mail.ru
Thank you very much