I was at an Ollie’s Bargain Outlet and I found these on their shelves. Apparently Disney had a “Precision Series” of the main cast of CARS. Each car comes with what appears to be a keychain tag. I didn’t buy any of them because I’m only collecting Miatas, R33s, and any chase/treasure-hunt diecasts as my 1/1 scale Miata takes up most of my hobby funding.
There’re also dioramas for each character but they’re EXPENSIVE ($80+!) online. If you have a thousand or more to burn away, you could build your own miniature Radiator Springs!