How would bellows help in this situation?
The Roessel copy of the Frazier system (T-Rex) should be cheaper. Dan has mentioned a split diopter this might be a good idea btw what 35mm camera will you use this is not unimportant since not every lens is suitable for every mount come to think of it most adaptors will cost more than a few days panavision, Arri or cpt rental.
Agx had a good idea about the bellow you can use enlarger lenses and repro lenses that do stop down to f45 etc...
Lomo made a 75mm macro lens with with 1:1 magnification Oct 19 Mount and it uses a bellow in macro mode. RAF Camera sold them for around 500$