USB Joystick Adapter from Retronic Design on Tindie
eBay: Adapter to connect two joysticks Atari 2600 the PC via USB (NEW Dual Port PC Computer USB Port Controller Adapter for ATARI 2600 JOYSTICK) - Skooter Blog
iCode Atari Joystick, Paddle, Driving to USB Adapter 2 ports 2600 7800 XE/XL/ST 713937829292 | eBay
TI-99/4a to Atari 2600 Joystick Adapter - TexElec
raphnet. - Genesis/SMS/Atari controller to USB adapter
Retro Classic Controller Gamepad Joystick For Atari 2600 Game Rocker With 4-way Lever And Single Action Button - Joysticks - AliExpress
ATARI Joystick Controller CX40 Replacement for ATARI 2600 Extra Long 10ft Cable
Classic Atari Joystick to USB Adapter - YouTube
Trooper Premium Joystick Controller for Atari 2600 - Stone Age Gamer
Atari 2600 AC Adapter RetroBit - Stone Age Gamer
USB Adapter for Atari Joystick, Paddle, Driving by iCode, Dual DB9 Ports Converter, Pro Plus Edition
Retro Joystick USB Adapters from iCode – RetroGameBoyz
Hyperkin "Trooper 2" Atari 2600 Style Premium USB Controller for PC, MacOS, Linux, Raspberry Pi, RetroPie - Newegg.com
Amazon.com: USB Adapter for Atari Joystick, Paddle, Driving by iCode, Four Port Multiplayer, Pro Edition : Video Games
USB Atari RetroPort - retroUSB
Atari 2600 USB Joystick (Retro-link) - Stone Age Gamer
Icode Atari Joystick Paddle and Driving USB Adapter With LCD - Etsy