Amazon.com: DB9 null modem male to female slimline data transfer serial port adapter 2 Pack : Electronics
RS232 null modem | Null modem adapter
DB9 M/F Null Modem Adapter
DB9(m-f) Null Modem Slim Line Adapter
Tripp Lite 18in USB to Null Modem Serial Adapter FTDI w/ COM Retention M/F 18" - serial adapter - USB - RS-232 - U209-18N-NULL - USB Adapters - CDW.com
DB9 Male to DB9 Female Serial RS232 Null Modem Adapter | Serial RS232 | Computer Cables | USB and PC