There's a track on a Geto Boys album that prominently features the DSPLDETH sound. Seems unremarkable... but this particular album was recorded in 1991, and in Texas no less! Maybe Bobby Prince sampled one/found the same sound library of those hardcore gangster rap albums everyone at iD was listening to? If anything, the sound can be sampled from this by people doing high-def sound packs because it's in pretty good quality.