Keep in mind that color cast does not only affect color, it also affects contrast. It will be easier to correct, but can still be an issue occasionally.
It may actualy be quite simple to put a 38 Biogon onto a Fotodiox Rhino Cam. The front of the camera is flat and an if I understand correctly
it already uses adapters to mount different brands of lenses.
It looks like these adapters have a bayonet on the Rhino side and then the Hasselblad or Pentax or Mamiya on the other.
I think the hardest part of the modification would be the Rhino side bayonet, but you could get that from Fotoviox I would think.
On the Biogon side a simple tube that fits over the base of the Biogon would do the trick and give you some room to tune the lens.
The Biogon right by the SWC body looks like a clean cylindrical shape.