USBJoy2.0 - adapter. Connect your Atari Amiga C64 joystick to PC! Develop your own usb device! - Polish electronics for 3D printers, CNC, robotics, retro computers
Arcade Evolution Amiga Joystick, Amiga Kit Amiga Store - the world's largest Amiga Store - we ship worldwide
Amiga Joystick to USB Adapter Cable - English Amiga Board
Amiga/C64 Style USB Joystick Rare ? - RetroPie Forum
Competition Pro Extra USB Joystick - Amiga Shop
Converting the “Competition Pro Extra USB” to C64/Amiga/Atari DB9 – pagetable.com