I have, in the past, taken a very old (1880's vintage) lens and stuck it on the end of a Russian made macro bellows which was then attached to a Canon EOS. So it is certainly possible to do.

It helps to have access to a workshop complete with a lathe along with a well stocked scrap bin of assorted lumps of metal along with a few dead lenses - The dead lenses are invaluable for that all important bellows<->camera mount.