According to GM Parts Direct, both the S-10s and the J-Bodies camshaft have the same part number. S-10s use a differnt exhaust manifold. The blocks are the same, so the starter is in the same location and have the same part number.
Mantapart is over priced and they take a long time to deliver, there are many other companies that have just as good or better parts for less.
I haven't dwelt a whole lot in to the S-10's 2.2L performance parts, but the internals are the same so any of the J-Body internal performance parts will work also, I'm just not sure about the bolt-ons.
There is alot of information on the 2.2L at
http://www.j-body.org/, just do some research. You'll see me posting in many of the threads about the 2.2Ls and 2200s.