OK, I installed The Clap from Paper Stone Instruments. It's very good.
http://www.sampleism.com/paperstoneinstruments At first, I couldn't get it to work in Kontakt because I was getting a msg that said "785 samples not found." Glyn at the company was quick to respond and the problem was resolved immediately. (Basically, when you get that message, the error box has a place to browse for the sample folder. You do that, and then resave the nki, and the problem never happens again. It took less than 5 mins to resolve.) He also told me a version 2 is on the way. Awesome.
The instrument sounds really good. The Clap as an octave of keys mapped to different numbers of clapping hands: the first key is one person, the next is two, etc. all the way up to 13. I have had good luck by using a small number of claps on each side of the stereo image, but one of the larger groups using the stereo mic option is also good.
Secret tip from The Mighty Konrad: If you use two tracks of claps with the same number of people in each, on one track, put a clap note with zero velocity right before the real notes so the two tracks are playing different round robin versions. This is really an old technique from orchestra sample libraries.
For $20 bucks, this is a pretty handy set of samples. Great suggestions above about making my own, but too much trouble to save twenty bucks.
Maybe I will regret that when I am homeless and need $20 for wine.