If you have the 11" clutch with the pressure plate that is held on with 9 bolts then chances of finding a new or rebuilt one is not great. That's the size my truck has, and it was easiest and cheapest to send mine out through my local NAPA for a rebuild.
You may be able to get an even better price if you deal directly with the rebuilder, someone may know of one they have used?
Grigg