Amazon.com: The C64 Micro Switch Joystick (Electronic Games) : Video Games
USB Joystick Adapters – breadbox64.com
C64 Joystick Adapter - Share Project - PCBWay
Koop C64 Joystick
Amazon.com: Retro Games The C64 USB Joystick for PC : Video Games
The C64 Joystick Adapter
How to Convert Any Commodore Joystick from 9-pin to USB using The C64 Joystick - YouTube
USB Joystick Adapters – breadbox64.com
C64 Mini Controller - for Commodore 64 Mini Console - Stone Age Gamer
UPDATE] Converting the “Competition Pro Extra USB” to C64/Amiga/Atari DB9 – pagetable.com
USB Joystick Adapter from Retronic Design on Tindie
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
Amazon.com: The C64 Micro Switch Joystick - Clear (Electronic Games) : Video Games