Last week at practice, a horrid burning smell wafted through the jam room. Turns out, the PA speaker had a horn attenuator that decided to almost catch fire. It's a Fender 1275A speaker and the part has "AT-68 L-16(ohm sign)" on it. Since these are ancient speakers, I didn't see an easy to find source for a new one. Anyone have a suggestion on what to do for a replacement? And where I could get one?