Yes, there is a Robocop character. I believe it was made by someone named coppermine. It was once available at the old 3D-CC site, but it doesn't appear to survived the move to AniMotions.

You might want to make some inquiries over there and see if anyone can hunt him/her/it down.

Questor has Robocop's autopistol available at his CG Alcove. Well, actually it's the Ares Predator from the Shadowrun role-playing game, but by amazing coincidence it looks exactly like the gun from the movie.