Pop'n Music Sanwa Button, switch and spring set (OBSA-100UMQ) – bluespringexpress
Amazon.com: EG STARTS 10x 24mm Push Button Built-in Micro Switch Replace Compatible for Sanwa OBSF-24 Buttons Arcade Joystick Mame Jamma Games White Colors : Toys & Games
1PCS Original Sanwa 30mm Push Button Start Switch OBSF-30 Durable DIY Jamma Arcade Game Joystick Console Parts - AliExpress
Amazon.com: EG Starts OEM 12x 30mm Push Button Switch Copy Sanwa Obsf-30 Obsc-30 Obsn-30 Buttons DIY Arcade Fighting Game Kits & Super Street Fighter Games - Each Color 2 pcs : Video Games
Sanwa OBSF 24mm Pushbutton - Green with Black Bezel
Sanwa OBSF-30 Original Push Button 30mm For Arcade Joystick Games Console