Insignia™ 1.3' USB-to-RS-232 (DB9) PDA/Serial Adapter Cable, with Prolific Chipset Black NS-PU99501 - Best Buy
Meade USB to RS-232 Serial Adapter
USB Micro B to DB9 RS232 Universal Serial port Adapter Cable Smartphone Android | eBay
RS232 to USB adapter cable - RS232-USB-Cab
RS232 Adapter Cable to USB 2.0 - C003|STEPPERONLINE
RS232 to USB Adapter: Connect USB printer to Serial port | eBay
USB 2.0 to Serial (9-Pin) DB-9 RS-232 Adapter Cable 6ft Cable - Sabrent
Amazon.com: CableCreation USB to RS232 Adapter with PL2303 Chipset, 6.6ft USB 2.0 Male to RS232 Female DB9 Serial Converter Cable for Cashier Register, Modem, Scanner, Digital Cameras, CNC,Black : Electronics