I've not had any luck finding suitable examples of dump beds for these trucks. Odd considering the micro truck tilt bed scene and all. I did run across a vid on YouTube of a small Toyota pickup with a dump conversion. The guy took a kit for full size truck and modified the frame (cut one of the cross bits) of the Toyota to fit it.

The SteathDumpTrucks shop is somewhat local to me. I sent them a note a while back asking if they had anything that fit. They replied with a flat no.

Frustrating..