NEW VINTAGE 3-BUTTON PS2 MECHANICAL MOUSE (Non-Optical) | eBay
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SANOXY USB to Dual PS2 Keyboard Adapter for Keyboard, Mouse SANOXY-VNDR-Dual-pS2-blu-2port - The Home Depot
Mus med PS2 tilkobling – elektron.no
Mouse track ball ps2 interface in Stock Buy | Repair | Exchange from World of Controls.
Can you use the official PS2 mouse on PS1 games with mouse support? (On a PS2 of course) : r/ps2
Thanks to @El_Topo_54 advice I found a working mouse for my PS2. I tried Half Life 2 and Soldier of fortune :) . Any other games I should try with this? : r/ps2
Finally found one, Official PlayStation 2 USB mouse : r/gamecollecting