I am retrofitting a Compact 5 PC lathe and have an available stepper board and original stepper mottors if you are interested. The Compact 5 PC and Compact 5 CNC use many of the same boards.
The part number on the stepper motor board I have is:
Look up the part number on your board and if the same this one may be of use to you.
If interested we can discuss how to trade. I would consider selling or trading for tooling.