Heehee I know what you mean!
I'd never heard of them before, either. It seems that they were meant for education use, but found a good niche in medical sample handling.
I think the arm I got came from the garage of an engineer who integrated them for such lab uses. It looks doubtful that I'll get to complete the kit from that source. Next step is to contact the manufacturer and see what they can provide.
I looked on eBay a little, but didn't find anything at all.