2-port DB-9 Serial (RS-232) PCI-e Controller Card,WCH382 Chipset
4-port/8-port USB 3.0 PCI Express Card - AX92321
SUNIX - RS-232
Amazon.com: MZHOU PCI-E to USB 3.0 PCI Express Card incl.1 USB C and 2 USB A Ports,Adding M.2 SATA III SSD Devices to a PC or Motherboard Using M.2 NVME to PCIe
PCI card to USB, No brand - Direct importer
Amazon.com: 2 Port PCIE Expansion Card, Aideepen 2 Ports PCI-E to USB 3.0 Expasion Card with 4-Pin & 20 Pin Control Card Adapter PCI Express Controller Hub for Windows : Electronics
5 Port PCI USB 2.0 Adapter Card - USB 2.0 Cards | StarTech.com Europe
EMRICK07G 2-Port USB 3.2 Gen 2 Type-C PCIe Card - Conceptronic