There's been some good fanart using the Toy/SNES Dr. Claw character model.
This one's alright:
http://www.deviantart.com/deviation/...+age_scale%3A5
This one takes a bit of an artistic license, shaving his head and adding a cyborg eye, which I think works better:
http://www.deviantart.com/deviation/...+age_scale%3A5