Amazon.com: StarTech.com 1m Black Straight Through DB9 RS232 Serial Cable - DB9 RS232 Serial Extension Cable - Male to Female Cable (MXT1001MBK) : Electronics
Amazon.com: JUXINICE Copper Wire Db9 Female to Female Cable 3ft Double Shielded with foil & Metal Braided,Gold Plated D-SUB 9 Pin RS232/RS485 Extension Serial Cable RS485 Cable-Black (Female to Female, 3.3FT 1M) :
Tripp Lite 5ft USB to Serial Adapter Cable USB-A to DB9 RS-232 M/M 5' - serial adapter - USB - RS-232 - U209-000-R - USB Adapters - CDW.com
DB9-DB9 Extension Cable (3M, CAN Bus) – CSS Electronics
6ft Serial Cable, UL, DB9 Male to DB25 Male, RS232