Jeff, my friend has a vinyl cutter and he makes kits for many dirt track cars around here. If most of what you want is single color stuff (or shadowed with 2 colors) he can make whatever you want. He's lettered up my vintage super stock drag car to make it look like cars that ran in the 60s on several occasions. After I get bored with one desgin, I just grab the hair dryer and remove the vinyl and I'm back to just paint. Let me know if you don't have any luck finding a whole kit and we can talk about making up what you need.
Craig
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Craig
MC21 SP Rothmans
MC21 R fake Rothmans - track bike
MC21 SE R9N