Digi. Back Prices Cheapest

I want to experiment with screw mounted Leitz Hektor with a homemade camera and a cheapest possible MF digital back. It can be used.
Which online sites have a collection ? Any suggestion ? I love the look of these cubes so I dont want a 35 mm.
It must be damn cheap.

Best ,

Umut

Umut

This is an analog forum. You are better off, asking this question at other forums, specializing in digital photography.