Null Modem Cable, DB9 Male to DB9 Female, UL rated, 8 Conductor, 10 foot - Walmart.com
RS-232 Null modem cable
StarTech.com USB to Serial Adapter - Null Modem - FTDI USB UART Chip - DB9 ( 9-pin) - USB to RS232 Adapter - Add a Null Modem RS232 serial port to your laptop
Serial Port 9 Pin Null Modem Adapter DB9 Male / Female RS232
DB9 9Pin RS232 Serial Port Male to Male Null Modem Adapter Gender Changer
Amazon.com: StarTech.com 1m Black DB9 RS232 Serial Null Modem Cable F/F - DB9 Female to Female - 9 pin RS232 Null Modem Cable - 1 meter, Black : Electronics
Adapters and Cables - Verifone 9pin Null Modem - Seneca Store