WTB - Parker SD15 Stepper Drive Card for TechnoIsel Router

One of the drives in my TechnoIsel router went out the other night. It's a Parker SD15 card from a "MAC 200" enclosure, although I gather these were used in other machines as well. If anyone has one I want to get this machine back up and running. If I can't find one I'll be starting a help thread on how to retrofit this controller to run a newer drive...

stepperonline has a lot of cheap stepper drivers that you can take a look at. https://www.omc-stepperonline.com/stepper-motor-driver/