Commodore 64 1351 Compatible PS/2 Mouse Adapter (Use with Geos etc) - USA Seller

Commodore 64 1351 Compatible Optical Mouse with Adapter (Geos etc) - USA Seller

Commodore 64 Joystick Joy Switcher Circuit C64 Plus PS/2 Mouse Adapter

Retrofun Twin Joystick Mouse USB Adapter for Commodore Amiga / C64 & Extension

Mouse Master, Commodore/Amiga/Atari ST/Others, Practical Solutions Switcher

Commodore 64 Mouse Adapter PS/2 PS2 to 1351 4x Different Modes

C64/128 PS/2 Mouse to 1351 Adapter