Talk to Paul at Pro Digital Inc., 700 Park Way. Ste. B., Broomall, PA 19008 , (610) 353-2400 Monday-Friday: 10 A.M. - 6:30 P.M. (EST)
sales@prodigitalinc.com
I am pretty sure he rebuilds these amps. He did a Sony M1 rebuild for me back in the day. quick turn around and reasonably priced.
Peace OOK