If search was working I probably could have found the answer to this but it's down so here goes. Are the green USB to PS2 type adapters that come with mice (I have several with mice logos on them ...

SCEA announces that official stand-alone USB headsets for the PlayStation 2 are now available in North America.

You can finally use a DualSense controller on your PS2 with this adorable new Bluetooth dongle from 8BitDo.