Courtesy of Northlight Images
I've just discovered that Hartblei
make a set of tilt and shift lenses which have mounts for the Canon EF, Nikon F, Sony/Minolta, PentaxK, Leica R and Contax mounts.
Click on the product names for more on each lens. I've no idea how well these lenses perform on DSLRs with tightly packed pixels but I do know they aren't cheap. The good news is that there's a 10% discount if you buy the set of three directly from Hartblei or selected dealers. Yours for only €8904.