USB to PS/2 Adapter | Adapters and Couplers | Audio Video
Amazon.com: Wiegand Converter Wiegand to USB Wiegand to Serial RS232/PS2/ABA/TTL , Serial to Wiegand Converter, Up to 128 Bits Wiegand Data, Android/Linux/Widows/iOS(Host with Serial) : Electronics
PS2PRO RS-232 Converter by Versalent
Adapting a Serial Device to ps2 or USB output
Serial connector adapter DB9 male to PS2 miniDIN 6-pin female - Cablematic