I think it's a double-pole, double-throw momentary switch. I'd think any nearby dealer parts dep't would have one. If you have rear stabilizers, they probably use the same type of switch and in a pinch, you could borrow that switch to get the landing gear working.
Before taking wires off, it's a really, really good idea to take a clear picture, make a diagram, and mark the wires so you can get it back together.