Amazon.com: Retro-Bit Official Sega Saturn USB Controller Pad (Model 2) for Sega Genesis Mini, PS3, PC, Mac, Steam, Switch - USB Port (Slate Gray) : Video Games
raphnet. - Sega Saturn controller to USB adapter (v2)
raphnet. - Sega Saturn controller to USB adapter (v2)
BrawlerGen - Retro Fighters
Sega Saturn MODE Easy Access SATA Adapter Mounting Kit with M.2 Support - Stone Age Gamer
Retro-Bit Official Sega Saturn USB Controller Pad for PC Mac Steam RetroPie Raspberry Pi - USB Port - Slate Gray - Walmart.com
Making a USB Saturn Pad
Saturn Mod Kit + retro-bit = works! (also works with old retro-link pad) : r/8bitdo
Making a USB Saturn Pad
8BitDo Mod Kit for Original Sega Saturn Bluetooth Gamepad for Original MD Controller for Windows Android macOS Switch
Saturn USB controllers | Sonic and Sega Retro Forums