I was informed by an inside source that a different head for Cliffjumper was actually discussed by the design team. Why they didn't go through with it though I forgot to ask about. In the end it was Hasbro's loss and the guys that made the CJ upgrade kit (and the guys that sold theirs for 1000% profit) gain.

As for this Roadbuster upgrade, I'm not too fussed on getting it as I mainly collect my Classics as an homage to the cartoon and not the toys.
If it's cheap enough I'll be all over it though.