Yup, that's the name of em'. And I thought that they were propo steering cause when I looked at the seering setup I saw a lot of gears and such instead of a magnet setup(course I could be wrong, it's been known to happen).

As for finding bits and such, I've got numerous Radioshacks for zips(my fave right now) Toys 'R Us for Microsizers, and KB Toys for a few clones(Rally Racers), other than those, I'm kinda SOL around my neck o' the woods.