VGA 9Pin D-SUB DB9 RS232/485 Solder Connector Female Male Computer Metal Housing | eBay
CableCreation USB to Serial Cable 6.6ft, USB to RS232 Adapter, USB to DB9, RS232 Converter 9-Pin FTDI Chipset for Windows , Mac OS and Linux - Walmart.com
Rs232 Db9 D-sub9pin Female To 2.5mm Audio Jack Cable For 2820 Radio Intephone Clevercheck Td 4209 4207td-4222 Pc Connect Cable - Pc Hardware Cables & Adapters - AliExpress
StarTech.com 3ft USB to RS232 DB9 Serial Adapter Cable | www.shi.com
Amazon.com: 6FT DB9 9 Pin to RS232 3.5mm Audio Jack Serial Adapter Cable FTDI Chip DB9-RS232-AJ : Electronics