USB to Serial Adapter w/ Detachable USB - Serial Cards & Adapters
Manhattan PL-2303 USB to Serial Converter (205146)
Usb To Null Modem (cross Wired) Rs232 Serial Adapter Ftdi Ft232r Usb Rs232 To Db9 Female Adapter Cable Pc Control Tv Cable - Pc Hardware Cables & Adapters - AliExpress
USB to Serial Converter Lite - from LINDY UK
Insignia™ 1.3' USB-to-RS-232 (DB9) PDA/Serial Adapter Cable Black NS-PU99501 - Best Buy