Hello Everyone, I have a Marshall Valvestate VS30R. I've been having trouble with the input jack for awhile. I took the amp apart and found that one of the terminal pieces on the underside of the jack was missing and there was a slight burn on the PCB where it should have been. I was wondering if these types of stereo input jacks (1/4, I believe) are interchangeable. Some are offered at Radio Shack. But would I definitely need to get a marshall replacement ? And if so, where should I look to order it online ? Thanks in advance.