Dress ideas for Meg from Hercules costume?

My Sadie Hawkins dance is coming up, and the theme is Disney. I want to go as Meg and Hercules. I want to wear simple, purple dress but I can't seem to find one. I found this picture-a href="http://www.polyvore.com/meg--hercules/set?id=14001800" rel="nofollow"http://www.polyvore.com/meg--hercules/se…/a that has a very cute bright purple cami dress, but it's out of stock on the website. Can anyone help me to find a dress that is similar to this one? Thanks! :)