Punch 45HD

Just got this one from ebay as I wanted to try and repair something different than a trans ana based Fosgate amp.

I cracked it open and first thing I notice is a missing transistor in the power supply. Ok, I can fix that with what I have on hand. Shortly after I notice one of the boards appears to have had a large portion of the surface mount components along with most of the traces removed.

Before I touch anything else in this thing, is there a source for the boards for a decent price? I don't think I can rebuild the board with what's left.