Sounds like a good idea. The thrift store where I do a lot of my clothing shopping has both recent things and...clothes of a certain age. ;-) Anyone want a plaid leisure suit?
It might not be '50s, but he could surely find something that would look about right.
Actually, one of the other guys could use the leisure suit.
Jr. just has to look more streetworthy for that scene. The others are full Saturday Night Live polyester.