Buttons are dying on my Ground Control Pro

[CompanyKeeper]

Hey everyone,

2 of the buttons are dying (work about 50% of the time), I already tried opening it up and seeing what's wrong, and it's not the spring thingies that aren't aligned properly, it's the buttons them self, but I cannot seem to find where I can get new ones, I've been looking around the internet (and these forums) for a while.
Anyone know where to get new buttons? Or even if you can find a wiring diagram, it probably tells on it what kind of buttons they are so I can search for them.

Thanks in advance!