I found this little hobby shop one day after going to the mall. His supplies are limited, so if you have an off brand truck or car then you might want to look else where. If you have a Traxxs, then there is a good chance he'll have exactly what you need.
They specialize in trains so if your a train person, then this is the place to go. They also do planes and boats, but I havn't gotten brave enough to play with those yet.