I really need to find the dress Winona Ryder wore in Edward Scissorhands?!!!?

Ok, so i'm going to a Christmas party soon, and me and my boyfriend are going as Edward Scissorhands and Kim. I really really have to find a white dress like hers soon! It's kind of 50's style, white with 3/4 sleeves and off the shoulders. I'll be so happy if i can find one! Thanks :)