Used Black Buttons Right Button Repair Replacement for Sony PSP 3000 Left D Pad Buttons - Price history & Review | AliExpress Seller - Gamers Zone Store | Alitools.io
I did the UfighterX mod and d-pad diagonal is working flawlessly now : r/PSP
How-To: Craft an analog control stick for your Sony PSP (part 2) | Engadget