Mike, I am not sure that this lead will work out for you 100%, but please call John Adams at Community Audio in Philadelphia, PA. Phone number is (215) 242 - 4080.
John was a dealer for Golden Tube, and carried the line as long as anyone. I believe he has a connection to the owner of the former company, as Bill who works there dropped the guy's name to me almost two weeks ago. They even have a Golden Tube SE-100(12(???) EL34 output tubes) in the window as we speak. Undoubtedly, he has come across people along the way who needed these products serviced, so I believe he will point you in the right direction at the very LEAST.
GOOD LUCK!