Siel DK600 Parts Questions

I noticed that you have a few limited parts for the Siel DK600. Do you ever get functioning main PCB’s in stock? It looks like (from the picture) that this is the main board that I’m missing.

Or if it’s not something that you think you’ll ever carry, could you recommend any sites/companies I could reach out to?

Alternatively, in case I can’t manage to find that part I need and decide not to try and fix it, do you guys purchase parts for old synths like the DK600?