They are called THUNDER CHARGERS from MEGATOYS (
www.megatoys.com <from the package).
They have a car set and a suv set(27&49) = very ugly(my opinion) and the suv will flip over on my track if I turn to tight (but that is better than not turning at all) my track is high traction.
I did like the tip about Sam Goody's, I never would have thought to look there for RC stuff.
We should get a list going on all the different stores that carry bit's and clones of bit's although I'd understand if Tiny would NOT allow a list like that on his site.
Meijers
Target
Walmart
Toys-r-us
Wallgreens
Big lots
Radio shack
These are just regular stores I did not include the Hobby shops that carry cars around here.