Hey ORI,
I finally compared some sounds to the Headhunterz sound and found a few that are quite similar. (Not identical, but would be easy to tweak.) Most of them were on the TI Virus soundset from Superstar O, you can order it on
www.industrykits.com. I also found a similar sound in one of the Ultimate X Sounds soundsets, I think it's one of the sample sounds available on the Virus website.
Here's the patch names, in case that helps you decide what to do next.
UXS 0202 (Ultimate X Sounds)
And in the Superstar O (SSO) set:
Dance SY
Square Saw
Spooky LD
SOL Synth
Sick SYY
Cheers,
EG