Retro 9 Pin Joystick to USB Converter : 4 Steps (with Pictures) - Instructables
USB Joystick Adapter from Retronic Design on Tindie
Amazon.com: Retro USB Adapter for Atari Joysticks and Paddles - 4 Port/Players : Electronics
C64 Joystick Adapter - Share Project - PCBWay
Amazon.com: Retro Games The C64 USB Joystick for PC : Video Games
C64 MINI MAXI JOYSTICK COMMODORE ADAPTER ATARI TO PC WITH USB 64 128 THEC64 | eBay
DB9 joystick to USB adapter acting weird on C64 : r/c64
C64 USB Joystick Adapter
C64 Joystick Adapter - Share Project - PCBWay
Retronics USB Joystick Adapter and Other Coolness with V-USB | Code and Life
USB Joystick Adapter | nIGHTFALL Blog / RetroComputerMania.com
Build a USB Adapter for Retro Joystick and use it on your PC, MiSTer or Amiga A500 Mini - YouTube
Retronics USB Joystick Adapter and Other Coolness with V-USB | Code and Life
Dual 9 Way Atari/Commodore USB Joystick Adaptor
Amazon.com: The C64 Mini +1 Additional C64 Joystick : Video Games
USBJoy2.0E adapter - Extended Version. Connect your Atari Amiga C64 joystick to PC! Develop your own usb device! - Polish electronics for 3D printers, CNC, robotics, retro computers