I thought I'd share the schematics I finally received from Peavey support. I was hoping to find an existing footswitch but I've yet to find one that has 3 buttons and a 7-pin DIN male connector. Nobody uses that type of connector anymore. Peavey wanted $70 or so to build one, which is simply too expensive.
So I plan to construct me own, which should be fairly easy. My current plan is to construct a 2 button footswitch for Channel/EQ and skip the Effect button as I'd personally never use it, and I can make the pedal slightly smaller since it'll only need 2 buttons instead of 3.
The best part is you can use standard MIDI 5 pin DIN cables and connectors if you only want a 2 button footswitch like I do.
* Small aluminum chassis
* Metal paint
* (2) latching foot switches
* (2) LEDs
* (2) LED bezels
* Female 5 pin MIDI DIN panel-style connector
* Then just connect any standard MIDI cable between the foot switch and amp. 20' MIDI cables are readily available for $10 or less.
If you wanted a full 3 button footswitch you'd simply need another latching switch, another LED assembly, and buy some 7 conductor wire, and a 7 pin DIN male connector which is available on eBay for $4.50 shipped (cheapest place I could find it). http://www.smallbearelec.com/home.html
has the rest of the hardware, but not the MIDI nor 7 conductor wire. You could probably use Cat5 cable for the wire assuming the current travelling the wire isn't that great and won't cause it it to get too hot or something.
I'll post my completed project and parts list when it gets completed as I'm sure eventually some other person in the world will encounter the same situation.
I'm getting ready to try some DIY stomp boxes so this will be a perfect first project to cut my teeth on chassis wise.