C2G 1.5ft USB to DB9 Serial Cable RS232 Adapter Cable Convert a DB9 RS232 serial device to USB great for PDAs digital cameras and many other peripherals - Office Depot
StarTech.com USB to Serial RS232 Adapter Cable with COM Retention 1' - ICUSB232PRO - USB Adapters - CDW.com
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Amazon.com: Plugable USB to Serial Adapter Compatible with Windows, Mac, Linux (RS-232/DB9 DTE Male Connector, Prolific PL2303HX Rev. D Chipset) : Electronics
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Amazon.com: Cable Matters USB to Serial Adapter Cable (USB to RS232, USB to DB9) 3 Feet : Electronics
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