Manufacturer wanted $25 (+shipping) for a replacement garage door opener wall switch. 13 minutes of printing + 5 minutes of soldering + two leftover Cherry MX Blue switches (that I'll be use) and the problem is solved 👍

Note: The wiring was slightly more involved than I thought... needed a resistor for the light (there's only two wires but it's got two functions: Light on/off and garage open/close.

If folks are interested I could make a much fancier PCB-based version with screw terminals and whatnot. It's a very trivial schematic.