¿What are the options for 100 degree field of view on a Sinar P3?

I am working towards an Apo-Digitar 47XL in a 35mm sunken lensboard with a Sinar eShutter, bag bellows and the special Sinar sliding back that replaces the rear standard...

any alternatives?

Has anyone got anything similar to work?

Bu the time you have bought all the parts you need, I think you could have bought a pancake camera, but I think you would not get as much tilt.