I also have the tx81z. You can make pads on it, but its a bit more difficult.
Ive just finished listening to some dave angel.
Korg Z1, and various samplers could do the job, in which case you could stick with software and get by.
I just saw a picture of the inside of daves studio. theres a clavia and and akai s-2000, and some other mass produced digital stuff. There is a TX81Z in there.
So yeah, software. Just comb through the presets in the software program, find something close and start tweaking.
Or, email him and as him for some sysex data.