YIOVVOMDB9 breakout Connector (Male Connector and Female Connector)

YIOVVOM DB9 Female and Male Adapter, 9-pin RS232 D-SUB, Industrial Control Products, Electronic Adapter

DB9 null modem male to female slimline data transfer serial port adapter 2 Pack

StarTech.com 10 ft Cross Wired DB9 to DB25 Serial Null Modem Cable - F/M - Null Modem Cable - DB-9 (F) to DB-25 (M) - 10 ft (SCNM925FM)