I've seen quite a few big process cameras simply thrown away. Or check used equip listings under
industrial printing rather than photo gear. Or you can make one out of a big clunky view camera.
Or many of the classic Durst enlargers like the 138 can be quickly pivoted on their side. The feet
have sheave rollers, so all you need to do is install matching floor rails and a wall easel. Just make
sure your light source has bulbs intended for the horizontal position. Some of the older Durst mural
heads had an incredible amt of light for big enlargements - sometimes too much - you'd need a helluva cooling system and power supply, but they were overkill for black and white printing.