Amazon.com: eXtremeRate Carbon Fiber Dawn Programable Remap Kit for PS4 Controller with Upgrade Board & Redesigned Back Shell & 4 Back Buttons - Compatible with JDM-040/050/055 - Controller NOT Included : Video Games
2X JOYSTICK PS4 PLAYSTATION 4 ANALOG CONTROL THUMB STICK BUTTONS R3 L3 GRAY ENV | eBay
Sony Game Console Accessory L3 and R3 Potentiometer Replacement for PS3 & PS4 - iFixit Repair Guide