Quote: I have one here that's 2 years old that would rather starve to death than eat anything other than live fish.

If I can sneak a pinkie in his water bowl, I may just get lucky, but there better be live fish in the water with the mouse.

This may not work for you but have you tried putting several pinks in the water dish and them dropping a tube connected to a fish tank air pump in?, so the bubbles would move the pink around. Keep the motor away from the enclosure to avoid scaring the snake, all it takes is a long tube. Both the pump and long tube is fairly cheap to guy