Nothing like that exists. The problem (imo) is the type of suspension, lockers, and gearing needed to make it work. It would need a selectable locker up front or it won't turn well at high speeds. That are no selectable lockers for an R/C. The suspension stuff would be crazy to try and make work well in all situations. I am going to build a trail rig that would be a little bit of everything but just not that fast. RC4WD makes 2 and 3 speed trannys. That might be a way to get some top end but how much is the question. The problem with that is, just like in real life the more you add to make it work, the heavier it gets. And that's not good either.
