It would depend on where the crack is. If it's on a hinge point, like where the lower control arm attaches to the chassis, I would recommend just replacing the part as parts for that car are very cheap. You can get a whole control arm set for $4.99 from www.toyhaus.com They have very reasonable prices, and have great customer service. I had an old SP1, and had a broken front hub. I could not find anywhere to get the replacement part, so the car sat for a couple years till I found toyhaus. Then within a week, I was running it again. As far as the wheels, you can get the wheels pretty much anywhere. They should be the standard 1/10 scale touring car hex hub wheels. Hope this helps.