6 Feet AT Modem Serial Cable (DB9 Female to DB25 Male) - Micro Connectors, Inc.
CC307-10 - 10ft DB25 Female to Female Fully-Wired Cable for Parallel or Serial Applications
Amazon.com: JUXINICE DB25 Male to Female Extension Cable 3FT,26awg Tinned Copper Wires of 25 Different Colored, Double-Shielded with foil & Braid, D-SUB 25 pin Cable RS232 Serial Cable in Black : Electronics
DB25 Male to DB25 Male Serial RS232 Extension Cable - Custom Cable Connection