#1
My Peavey Ultra Plus' resonance switch broke off and I need to replace it... I don't mind calling Peavey and trying to get a new part, but I'm just checking first if I can use a spare guitar part.

There are three modes. Tight. Medium. Loose.

So, I'm wondering if a Gibson style three way switch will work instead. It looks like it will fit. But I'm not exactly sure if it will work.
#2
No, they're different types of switches. I'm not sure exactly what the Ultra Plus uses, but its definitely not the same sort of switch as a Gibson pickup selector switch.