It's a bit of a no-brainer to decide on a diorama theme with some model cars. Take this 1956 Ford Thunderbird, a nice 1:43 model made by Franklin Mint. It just screams American Diners to me, whether you're from TV culture and thinking of Happy Days, or movie culture and thinking of American Graffiti.
The Brando shot really caught my eye, because he's in his garb from 'The Wild One' but the bike he is sitting on isn't usually one that you think of being part of the Wild One. Here's the original shot.