This is something I found on my hard drive. From a recording that I made seven years ago, a set of scratchy noises, that I produced by tearing a rubber party balloon with a wet finger. Yesterday I mapped them in Kontakt to use as an "instrument". It sounds like this:
Download package - 3 MB, 32 samples in wav format, mono 44,1 kHz / 24 bit and a mapping for Kontakt 2 or newer. The scratches are simply assigned to keys, from F2 to C5 and mod wheel controls the sample start position. I find it most fun to play scratch sequences while fiddling with pitch and mod wheels. As a bonus there are 4 "hit" samples, which are sounds from the same session, made, as you may guess, by hitting the thing, instead of tearing it. These are mapped to C1-E2 range in some awkward way. Free to download and use.