Had a spare cybertron Longrack head lying around, so I picked up one of the RTS Bumblebees and whacked it on.
The head was a real easy fit. The hard part was getting the paint to match the body (in the end I mixed yellow with a dash of orange). I used some spray-on chrome for the face, then put some dull-cote on it, which turned the chrome into a very nice shade of grey.
I think the colour and the stripes set him apart enough from Bumblebee