You can pick up a genuine pre-war camera for $10 on "that site", and they're virtually indestructable. Most cheap camera's from that time period use 620 film in 6x9 format, but can be persueded to take 120. With a 1930's box brownie or classic folder, and a few roll's of Ekfe you can have almost exactly the same set up as would have been used.

6x9 is such a cool format, that even bad camera's can produce fantastic tones using it. The camera's are so cheap its just not worth messing round in 35mm when what you're trying to preproduce was probably done with one of these.