Amazon.co.jp: Cable Matters USB RS232 Converter Cable 1m USB Serial Converter Cable USB Type A to DB9 Serial Male Support Both Windows Mac OS : Computers
StarTech.com 3ft (1m) USB to Serial Cable, DB9 Male RS232 to USB Converter, USB to Serial Adapter, COM Port Adapter with Prolific IC, 1 (Quantity) - Walmart.com
RS232 Serial Port DB9 cable to cross head (2-3 Cross) - homenet48