Last night I had my Ampeg SVT4-Pro just stop. All lights out. Checked the back and noticed the 15 Amp breaker button was popped out. When I tried to pop it back in, it all popped out with a spring and two other little parts. It appeares that one of those little parts broke. So are these 15 Amp Breaker switches readily available and replacible by the common do-it-yourselfer? Anyone else have this happen?