Amazon.com: 15 Foot 5m Straight Through DB9 9 Pin Serial / RS232 Male to Female Extension Cable : Electronics
Tera Grand - 6 FT USB C to RS232 Serial DB9 Cable with Thumbscrews
C2G DB9 Extension Cable - serial extension cable - DB-9 to DB-9 - 25 ft - 52033 - Serial Cables - CDW.com
DB9 Male-Female Cable – CommFront
Amazon.com: StarTech.com 1m Black Straight Through DB9 RS232 Serial Cable - DB9 RS232 Serial Extension Cable - Male to Female Cable (MXT1001MBK) : Electronics
DB9 RS-232 Male to Blunt - All 9 Pins - 22 AWG Plenum - Serial Breakou - Custom Cable Connection