Amazon.com: eXtremeRate Blue & Red Custom Trigger Extenders L2 R2 Buttons for PS4 Controller, Game Improvement Adjusters for PS4 Pro Slim Controller : Video Games
Controller L2 R2 L1 R1 Trigger Buttons DualShock JDS JDM 030 for Playstation PS4 | eBay
Controller L2 R2 L1 R1 Trigger Button Spring JDM 040 050 055 for Playstation PS4 | eBay
How to FIX BROKEN R2 + L2 Buttons on PS4 CONTROLLER (Button Replacement) - YouTube