Amazon.com: StarTech.com USB to Serial RS232 Adapter - DB9 Serial DCE Adapter Cable with FTDI – Null Modem - USB 1.1 / 2.0 – Bus-Powered (ICUSB232FTN) : Everything Else
Amazon.com: DB9 Null Modem Adapter Male to Male 5 Pack : Electronics
Amazon.com: DB9 Male / DB9 Female Null Modem Mini Adapter : Electronics
Amazon.com: DB9 Null Modem Adapter Male to Male 2 Pack : Electronics
Amazon.com: SF Cable, 6 ft DB9 F/F Null Modem Cable RS232 : Electronics
StarTech.com USB to Serial RS232 Adapter - DB9 Serial DCE Adapter Cable with FTDI – Null Modem - USB 1.1 / 2.0 – Bus-Powered (ICUSB232FTN) : Everything Else - Amazon.com