Yes, there are prism finders available for monorails and a very few field cameras but why? Using the ground glass alone will make you a better photographer. It slows you down a bit and also makes you see the composition better. When images are viewed normally you tend to look over things because your eyes and mind correct without you even knowing it.

A college art teacher once taught me to put my drawings in front of a mirror. Just viewing the reversed image really showed me my mistakes.

The larger the film format the smaller the aperture needed to get the same depth of field. You can achieve this in three ways, slower shutter speed, faster film, or increasing the light using hot lights or strobes.