Amazon.com: iNNEXT [Bundle USB Version] 2 Pack USB Classic Controller, PC N64 & SNES Controller Joystick for Windows PC MAC Linux Raspberry Pi Project 64 Retropie OpenEmu Emulator(Plug & Play)(Grey/Blue) : Video
COMMODORE 64 128 User Port 4 player Joystick interface | eBay
Building a Paddle for Arkanoid, for the Commodore 64 - Valiant EN
Commodore 64 Joystick Port Switcher - YouTube
3MF file C64 Arcade Style Joystick・3D print design to download・Cults
Retronics USB Joystick Adapter and Other Coolness with V-USB | Code and Life
I added a vintage 9-pin port to my C64 mini, including working F-keys and extra buttons. Goodbye broken usb joystick! : r/c64