I've got a 2 button footswitch from my old Valve King I have no use of. I'm unsure but I think it's a universal one, I've seen this same switch used with the 5150 and XXX. It also worked on my Crate amp. Asking $35 shipped obo PayPal only.
Quote by Jearl

...dont play Fender just because its Fender.

Ibanez SZ520QM
Peavey Rotor EXP
Squier Bullet (heavily modified)
Mesa Roadster Head & 2x12 cab