Dan check here for info and models:
The Cheetah!!!
Bob Auxier is still building cars. He is behind the Continuation Cheetah which is authorized by Bill Thomas. -from what I've read. I guess he had a silver Cheetah at Vettefest a year or so ago.
CRC -Cheetah Race Cars (crank the volume before hitting enter)
Here is another site of an original car owner:
Cheetahs Always Win
Paul