Who has a 2 1/4" trackball mounting plate that would like to trade it for a "like new" Galaga joystick restrictor plate? (It's a plate that will fit into the original Galaga mounting bolt holes, but then you can attached a standard joystick from Happ or Wico to the plate, and the plate also restricts movement to only 2-way (even if your joy is a 4 or 8 way).
I had it on my Galaga and it works great, but then I managed to find an original joystick, hence I no longer need the plate.