I recently aquired a sunn concert lead. Should be late 70's. Black and Silver w/ Red treble swtiches. I am looking for the footswitch. Will pay top dollar. Will any other footswitch work? I have seen no info on this board about this. How much would it cost to have one built? I have the schematics but that was all I got from fender CS. Anyone with experience in area would be appreciated. If not, I might just get rid of the thing. It was either this, or shelling out for a JCM. I love the clean sound but I want channel distortion. Not fx pedal bullshit. I also need the knobs but i replaced with fenders and hey work, but don't line up. The disortion channel cuts in and out on Brite and does not really work on the normal jack. Is this normal for sunn? Great amp just small problems.