Don't know about the C64 version (it makes sense
that they would have made
one for it) but I have an Apple ][ Lego interface.
There was also a LEGO card for the PC, and I recall seeing a picture in a
LEGO book of one of the kits hooked up to, IIRC, a TRS-80 CoCo. FWIW, on
one of the instruction manuals, there's a picture of a compact Mac right
behind the motorized car, as if the car is hooked up to it.
The only type I recall seeing in the closeout pricelist four years back
was Apple II and PC. (The newer 9v equipment is now Mac and PC.)
Tom
Applefritter
www.applefritter.com