USB 2.0 To Serial DB9 Male (9 Pin) RS232 Cable Adapter - Sabrent
Poly - USB adapter - USB-C (F) to USB (M) | www.shi.com
USB-C to USB Adapter Converter USB-A - USB-C Cables | StarTech.com
C2G 1.5ft USB to DB9 Serial Cable RS232 Adapter Cable Convert a DB9 RS232 serial device to USB great for PDAs digital cameras and many other peripherals - Office Depot