What is a good source for reproduction and oem window cranks, arm rest, dome lights and these sort of things?

I own an Upholstery shop and most the time customers supply these sort of things. Sometimes I handle it for them and usually use paddock or jc whitney. This particular customer has no computer and just wants me to handle it. I am no internet whiz but thought it would be easy...No so much. His car is the problem I think it is a 1954 FORD CRESTLINE. I imagine thought that lots of window cranks and such were interchangeable. Any help would be appreciated