Amazon.com: Retro-Bit Official Sega Saturn USB Controller Pad (Model 1) (Old Version) for Sega Genesis Mini, PC, Mac, Steam, RetroPie, Raspberry Pi - USB Port - (Slate Grey) : Video Games
Sega Dreamcast OEM Clear Blue Controller | eBay
Retrogaming by modding original consoles to remove moving parts and add USB or SD-Card support - Scott Hanselman's Blog
raphnet. - Dreamcast controller to USB adapter (v2)
Improved Dreamcast Controller Design (more info in first post) : r/dreamcast
Original Dreamcast Games | Dreamcast Controllers | Joystick Dreamcast | Gamepad Dreamcast - Gamepads - Aliexpress
Sega Dreamcast Controller
StrikerDC Next-Gen Sega Dreamcast Controller - Stone Age Gamer
Mayflash For Sega Dc For Dreamcast Controller Adapter To For Windows Pc Usb/mac - Accessories - AliExpress
raphnet. - Dreamcast controller to USB adapter (v2)
Dreamcast White Controller HKT-7700 Genuine Japan Made Tested Working | eBay