This sfz uses sounds by kubriel. These sounds were extensively modified/looped by Jeff Glatt, who created this sfz version. You can find the original waves online at:

http://www.freesound.org/people/kubriel/packs/16428

License details
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Sampling+: http://creativecommons.org/licenses/sampling+/1.0
Creative Commons 0: http://creativecommons.org/publicdomain/zero/1.0
Attribution: http://creativecommons.org/licenses/by/3.0/
Attribution Noncommercial: http://creativecommons.org/licenses/by-nc/3.0