You could always try to make your own adapter if you want to try it out for a test and see if it focuses properly and gives you a result that is desirable. I would just rig something up with a tough material for a bellows between the lens and the mount and tape it there so it's light tight, I'd then stabilize the lens to secure it from falling off, take a few shots in the house, develop and see if it's worth pursuing further. It would really only work for a camera that has a shutter built into the body (not the lens) and allows you to focus through the lens -pentax 6x7 or similar.
If it's something you want to pursue from your results, you can always get a busted lens in the mount you want, take off the mount of that and off a body-type of the lens you wanted to mount, take it to a machine shop and see if they can adapt the two. Not a cheap process, but if you have unique images that are hard to reproduce by others, you'd have an interesting niche.