I need help finding this dress!

http://www.self.com/beauty/2011/06/how-to-wear-white-slideshow#slide=5
I am looking for a cheaper version of the dress in the above picture. I am completely in love with this dress, but cannot afford it. I have tried searching for similar dresses online, but so far I have been unsuccessful. If anyone is able to help me out I would greatly appreciate it! Thank you in advance. :)