Back when I had a few eBay bucks to burn I purchased some iridescent organza fabric.
http://www.ebay.com/itm/390516125475?var=660105981709&ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649 (their pic is much better than any I took)
I got 2 meters of it. The shipping was free with the eBay bucks. It came pretty quickly considering my package shipped from another country.
I am going to do one of the girl’s dress patterns I picked up at a recent 99 cent sale. I already have lining fabric, and plan on getting white for under the organza.