StarTech.com USB to Serial Adapter - Null Modem - FTDI USB UART Chip - DB9 (9-pin) - USB to RS232 Adapter - Add a Null Modem RS232 serial port to your laptop
3ft (0.9m) Serial RS232 DB9 Null Modem Cable with Low Profile Connectors M/M - In-Wall CMG-Rated | Serial RS232 | Computer Cables | USB and PC
Modem Router USR-G781 Transparent Data Transmission RS232 RS485 Serial New | eBay
StarTech.com USB to Null Modem RS232 DB9 Serial DCE Adapter Cable with FTDI - ICUSB232FTN - Serial Adapters - CDW.com
StarTech 1-Port USB to Null Modem RS232 DB9 Serial ICUSB232FTN
StarTech.com DB9 RS232 Serial Null Modem Adapter - F/F - Cost-effective way of converting a straight through cable into a null modem cable - Reliable Paper
StarTech.com 2m Black DB9 RS232 Serial Null Modem Cable F/M - SCNM9FM2MBK - Serial Cables - CDW.com
Rocstor Premium 5ft 1 Port USB to Null Modem RS232 DB9 Serial DCE Adapter Cable with FTDI
Null Modem Cables — Connective Peripherals - Global Store