There are some one piece costumes that are almost like two piece bedlahs, only connected withe a stripe in the front. Like this:
Pro Belly dance Bellydance costume - eBay (item 180206994621 end time Jan-17-08 21:50:23 PST)
I'll put in a thumbnail as well as I think the auction is about to end. This model for dress might work for you. There are other way more glitzy ones if you prefer.
