I've started retexturing some robots from other D2 missions to possibly use in mine, if it's legal.
I've got some screenshots of them, all of them in level 19 (Sliver Station).
I'm also changing most of the level textures into textures from D3.
One of the robots from Kryllidan Krusade, retextured:
The same robot, but with different textures, and weapons:
A robot from Project: Mandrill, retextured and given Guided missiles (which I've never seen used on a robot before.)
BTW - the screenshots were taken on insane difficulty using the "minemine" cheat that Diedel mentioned.