So are you moving away from your bench seat?
I wonder how compact the stock 8HP shifter could be made. Guessing it is just a position sensor and CANBus encoder. Sure seems like someone could make a business out of it. Run the cable through the clutch rod hole in the firewall and mount it vertically to the fire wall. Maybe just a 2"x2"x6" box?
Ah well, just another wild idea to go with all the others I don't have a way to build. :D