HP USB to Serial Port Adapter J7B60AA B&H Photo Video
Amazon.com: Plugable USB to Serial Adapter Compatible with Windows, Mac, Linux (RS-232DB9 DTE Male Connector, Prolific PL2303HX Rev. D Chipset) : Electronics
USB to Serial Converter Cable QI
PRO Single Port USB to Serial Adapter with Activity LED 3ft.
C2G 1.5ft USB to Serial Cable - USB to DB9 Serial RS232 Cable - M/M - 26886 - USB Adapters - CDW.com
USB/Serial Converter [FT232RL] : ID 18 : $17.50 : Adafruit Industries, Unique & fun DIY electronics and kits
USB to Serial RS-232 DB9 FTDI Mini Adapter with Extension Cable
High-Speed USB-to-Serial Adapter for Windows 8 32/64-bit - U.S.Converters
USB to RS-232 DB9 1-Port Serial Interface Adapter - Sealevel
3ft USB to Serial Adapter Cable, DB9
Amazon.com: StarTech.com 1 Port USB to Serial RS232 Adapter - Prolific PL-2303 - USB to DB9 Serial Adapter Cable - RS232 Serial Converter (ICUSB232V2) : Electronics
USB to Serial adapter, USB to RS232 converter
Tripp Lite Keyspan High Speed USB to Serial Adapter - serial adapter - USB - RS-232 - USA-19HS - USB Adapters - CDWG.com
USB 4-Port Serial Adapter - USB 2.0 to DB-9 Port RS232 with FTDI CHIP - Coolgear
1 Port USB 2.0 to Serial Adapter Cable - Serial Cards & Adapters | StarTech.com
Parallax USB To Serial (RS-232) Adapter With Cable - Parallax
USB to Serial Adapter Cable
Insignia™ 1.3' USB-to-RS-232 (DB9) PDA/Serial Adapter Cable, with Prolific Chipset Black NS-PU99501 - Best Buy
USB to RS232 Serial for Vista -- DataPro
Dual port RS232 Serial to USB adapter for RS232 data conversion.