I know several people around here either have or may, at some point, be building a replica SOC VDU, as used with the MK14.
It took some finding, but here is what may currently be the only Youtube clip of an MK14 driving an MK14 VDU, unless of course anyone knows differently. (The MK14 is visible on the far right hand side of the video image).
https://www.youtube.com/watch?v=q8YG0hjRbZo