A Converter You Won't Have: PS/2 Mouse To Serial Mouse | Hackaday
10961593 - Siemens Healthineers United States
Trust.com - PS/2 Optical Mouse
3 Button Optical USB Mouse
USB-to-PS/2 Adapter
Microsoft Optical Wired 1113/Usb/Ps2 Compatible Black | 000300247426 | Cash Converters
PERIMICE-209 P - Wired PS/2 Mouse with Scroll Wheel and 1000 DPI – Perixx USA
Microsoft Basic Optical Mouse V2.0 USB/PS2 Compatible não funciona - Microsoft Community
Microsoft Wheel Mouse Optical Drivers Download for Windows 7, 8.1, 10
Honglei HL-022 USB to PS2 Adapter,PS2 Keyboard and Mouse to USB Converter Cables, for Keyboard and Mouse, Plug-and-Play,No driver required,Black: Amazon.co.uk: Computers & Accessories
TechnoTech Wired PS2 Optical Mouse for Laptop, Desktop, PC (TT-A01)
PS/2 and Serial Wireless Mice for DOS Gaming - a few options, and quick reviews (in comments) : r/dosgaming
MICROSOFT Basic Optical Mouse PS2 /USB for Business 4YH-00007 - 1PC.co.il
Logitech 2x Optical Wheel USB / PS2 Mouse
A Converter You Won't Have: PS/2 Mouse To Serial Mouse | Hackaday