SANOXY USB to Dual PS2 Keyboard Adapter for Keyboard, Mouse SANOXY-VNDR-Dual-pS2-blu-2port - The Home Depot
Buodes Mouse Pads for Desk Mechanical Define the game USB Wired 6400DPI Adjustable Gaming Mouse Mice for PC - Walmart.com
Amazon.com: TRENDnet USB to PS/2 Converter, Easy Install, Universal Plug & Play, USB 1.1/2.0/3.0, Windows 8.1/8/7, Vista, XP, Mac OS 10.4-10.9, 13-inch Length, TU-PS2 : Electronics
StarTech.com Replacement PS/2 Mouse to USB Adapter F/M - use with PS/2 and USB capable mouse only (GC46MF)
Finally found one, Official PlayStation 2 USB mouse : r/gamecollecting
Amazon.com: TRENDnet USB to PS/2 Converter, Easy Install, Universal Plug & Play, USB 1.1/2.0/3.0, Windows 8.1/8/7, Vista, XP, Mac OS 10.4-10.9, 13-inch Length, TU-PS2 : Electronics
Meatanty USB Mouse Jiggler Tiny Undetectable Mouse Mover with Separate Mode and ON/OFF Buttons,Digital Display and Protective Cover,Supports Multi-Track,Driver-Free,Plug-and-Play Keeps PC Awake(2 Pcs)