I know that The Cars and the Gary Numan song where the namesakes for Kars, but I don't see any resemblences between his personality and the music. Do you?
I suspect that was one of the cases where the name of the band sounded so cool as a name that matching the music to the character didn’t matter that much.
[reaching mode on] Unless you wanna read Gary Numan’s song as sort of a metaphore for being closed off emotionally as a safety measure (”I feel safest of all / I can lock all my doors / It’s the only way to live”)
As for The Cars, something from these?: