that perfect dress

For the life of me, I cannot find a dress for a ball I'm going to at the end of April. You see, I have a problem - I'm skint. Very Skint, and I've resorted to eBay. I mean, its not a complete loss, I have 3 dresses that I could wear, all with their own unique problems - my weight. I can gain a stone and wear my lilac one, or lose 7 lbs and wear the blue one. But then, I've already worn the damn thing in front of the same group of people. Argh!!