TIKUS USB Maus / Joystick Adapter (für Amiga, ST, GEOS)
Amiga USB HID Mouse Adaptor
Tynemouth Software: Amiga 500 USB keyboard and dual joystick and the A500 Mini
tinkerBOY Amiga/Atari Mouse To USB Converter - tinkerBOY
USB mouse module rev.2 for Amiga 1200 (2B mainboard) – centuriontech.eu
tinkerBOY USB Mouse To Amiga Adapter / Converter (TRUE USB) - tinkerBOY
Amiga "Classic" USB mechanical keyboard - Lyonsden Blog
LL530 - Amiga Keyboard and Controller USB widget from UmlautLlama Products on Tindie
Amiga Keyboard to USB Adapter – TruMouse.com
USBJoy2.0E adapter - Extended Version. Connect your Atari Amiga C64 joystick to PC! Develop your own usb device! - Polish electronics for 3D printers, CNC, robotics, retro computers
Look at this USB option for Amiga 1200 Motherboards from Centurion Tech