I give up on the P-Type rims...
I have spent some time trying to use the rims Zankone posted, but by his saving to JPEG format I can't do anything with them. Every time I try something (be it the tire, fender, frame, or rims) just doesn't look right.
Admitedly the L-Type rims aren't great, but they're not hideous either...
However, I have found that it makes a cute Gadgetmobile, as discussed in an earlier thread: