GitHub - JRodrigoTech/GameBoy-DMG-Button-PCB: Game Boy DMG button adapter PCB board with: D-Pad, Select, Start, A and B (with extra X Y buttons for Mods like GB Zero).
Tactile Switch Panel PCB Mount Momentary TACT Switch Push Button for Arduino 6x6x5mm (Pack of 50 Pcs) : Amazon.ca: Tools & Home Improvement