I am building a medium format camera that uses 120 film and contains several digital and video parts. Final image format is 6x45 cm. I would like to mount the lens on a rail that allows to tilt and shift and lets me focus from macro to infinity, and whose mounts I would adapt to the body and lens I plan to use. A lot of commercial bellows that exist (Canon Auto Bellows, etc) are a good start but do not allow tilt/shift.
What is a good rail with bellows that would allow me to build the camera this way?