Hi there, I've diagnosed a noise problem with my 90's Epiphone Rivoli to be a defective inductor coil. When I engage the low-pass filter using the "baritone switch" an offensive amount of hum / noise is present. When I wire the bass to bypass the baritone switch entirely I eliminate the hum / noise. If I were to replace the inductor coil are there specifications I should be looking for? Have you ever sourced parts like the inductor coil or a replacement switch? Can you recommend a supplier? Thanks for any information you may have!