Post a WTB Wheelset in the bicycle section of your local C/L. You should be able to find something pretty quick, at a reasonable price, particularly if you are OK with 7 speed stuff.
This is good advice and, were I you, I would go with this option first. I will cost nothing to try and you just might get a pretty decent reward for a very small cash outlay. Heck, you might even get an exact match, if lady luck smiles on you. You have nothing to loose by doing this.