I designed some open source Logitech shifter/pedal adapters : r/simracing
Amazon.com: XBERSTAR Shifter for Logitech g25 g27 g29 Pedal to USB/Adapter /Converter/Adapter Cable/Logitech Pedal to USB (for Logitech G29 G27 G25 pedał) : Video Games
USB Shifter Adapter for G25 / G27 - Tomy Racing
Leo Bodnar] Logitech Shifter USB Adaptor Review [For G25/G27/Driving Force] - YouTube
Obokidlyamor Pedal Gear Shifter to PC Systems USB Converter Board Simagic Adapter for Thrustmaster T3PA/T3PA Pro for Logitech G27/G29 Parts - Newegg.com
Simagic Pedal/Shifter Adapter for Logitech & Thrustmaster
Logitech Shifter Knob Adapter Mod for G25 G27 G29 G920 G923 - Etsy
How to Build a DIY Logitech Shifter USB Adapter - Parts Not Included
Building a simple USB adapter for the Logitech Driving Force Shifter with Arduino | Arduino Blog
USB Adapter USB Cable for Logitech G29 Shifter
Genuine Shifter USB Adapter Cable Accessories for Logitech G920(Chip inside) | eBay
Shifter Adapter for Logitech G25, G27, G29, G920 : Leo Bodnar Electronics