DTECH Straight Through DB9 RS232 Serial Extension Female to Female Cable 15Feet Black : Amazon.ca: Electronics
Shop | StarTech.com 8 Port USB to Serial RS232 Adapter - Wall Mount - Din Rail - COM Port Retention -ftDI USB to DB9 RS232 Hub (ICUSB2328I) - Serial adapter - USB 2.0 - RS-232 x 8 - black
4Port PCIe RS232 Serial DB9 Adapter Card - Serial Cards & Adapters | Add-on Cards & Peripherals | StarTech.com