Wanted, Wanted, Wanted, Please Help!

Needing to buy Oleg Cassini CT92971( WHITE) size 10 or 12 (new or used with train) in good condition.I have a size 16 New with tags, that i had bought 4 years ago, and now i am a size 8, and thats to much altering to do. I already have three flower girl dresses that are also exactly the same as my dress brand new with tags,another reason why i need this dress. Getting married 6-7-8.