I am actually looking for a sample that contains this effect, like in this song by the Red Hot Chili Peppers at 0:55
It's known as a side-stick or cross-stick
Google found this http://freewavesamples.com/side-stick
or this set looks pretty comprehensive - http://www.freesound.org/people/quartertone/packs/8839/
I didn't test either of the above, I've got more drum samples here than I really know what to do with ;)
My drummer always called it a rimshot.