The input ("part # 35-00-4012 REV D" and on the back it says "guitar input 3/5/01") jack on my Flextone II Head received a jolt of power which has burned some of the circuit board and some of the little parts on the board next to the input jack marked C5 and C9. A friend of mine has the same amp, and I replaced the part with his and the amp works normally, so I need a new input circuit board part. Where can I purchase a new one? I don't want my amp to be fried simply because of an input jack.