Welcome @Gadg8man!
Chris be sure to do a search for info on the MKII M-500t amp upgrade...
If your interested contact Greg at Nelion Audio or message him;
his member name is @Nahash5150
Welcome @Todd in ND!
Try Hi-Tech Audio Ltd. in Stevenson, WA for Repair or Refresh of your receiver.
Another option is if one of our repair tech members wants to take on your project.
Good luck getting her singing again...
@MD80MECH,
Yes, SDA SRS have rebuilt X/Os (Solens platinum caps) Larry's metal rings kit and new gaskets.
Rebuilding the X/Os is well worth the cost. Night & day difference!