Shop | StarTech.com USB to Serial Hub - 8 Port - COM Port Retention - Rack Mount and Daisy Chainable - FTDI USB to RS232 Hub (ICUSB23208FD) - serial adapter - USB 2.0 - RS-232 x 8
8-Port USB to RS-232 Serial Adapter Hub
USB to 4 port RS232 serial converter adapter/ RS232 hub|usb to|converter adapterrs232 hub - AliExpress
USBGear Industrial 8-Port Terminal Block RS232/422/485 to USB Adapter with Isolation and Surge Protection - Walmart.com
StarTech.com 8 Port USB to RS232 Serial DB9 Adapter Hub | StarTech.com Cable Interface/Gender Adapters
Moxa UPort 1250I Serial Hub
8-Port USB 2.0 to RS-232 DB-9 Industrial Serial Adapter w/ FTDI Chipset & 15kV ESD Surge Protection - Coolgear
StarTech.com 4 Port USB to Serial RS232 Adapter Hub with COM Retention - ICUSB2324X - -
4 Port USB to Serial DB9 Industrial RS232 Adapter 15KV ESD and Surge