Amazon.com: Hand Grip Controller Handle Holder for PSP 2000/3000 Black Anti-Slip Design Ergonomic Easy to Install Durable Portable Gaming Accessory Control Enhanced Protection : Video Games
Generic PSP Handheld Game Machine, X12, 8GB, 5.1 inch Color Screen, Over 3000 Different Free Games, Dual Joysticks, 2500mAh, Blue - Walmart.com
Custom Analog Stick from eBay (info in comments) : r/PSP