Just catching up on several pages of this thread.

The YRX12 WE is the old car (02 worlds ish), Yokomo released another car in Japan a while back that was a copy of the car used to win the '04 worlds. It is black and has a different pod, with a 4 bolt top plate. It has cells sideways like L4 with the plastic cell trays but has a thinner chassis with more cut outs. Now i think that this is the car that was trying to be found.

http://www.teamyokomo.com/japan/news/index.html halfway down this page you will see the car that is the new best for ashphalt!