Amazon.com: StarTech.com 7 Port PCI USB Card Adapter - PCI to USB 2.0 Controller Adapter Card - Full Profile Expansion Card (PCIUSB7) : Electronics
6 x USB-A + 2 x USB-C 3.0 5Gbps PCI-Express Adapter Card, Compatible with Windows and Linux (Not support Mac OS)
US$ 12.81 - Desktop Pci-e to Double Pci Slot Expansion Card USB 3.0 to PCI Adapter Card PCI Add on Cards - m.xt-xinte.com
PCI-Express to PCI Adapter Card PCIe to Dual Pci Slot Expansion Card USB 3.0 Add on Cards Converter TXB024 - AliExpress
USB 3.2 Gen 2x2 PCIe Card - USB-C 20Gbps - USB 3.0 Cards | Add-on Cards & Peripherals | StarTech.com
StarTech.com 2-port 10Gbps USB C PCIe Card - USB 3.1 Gen 2 Type-C PCI Express Host Controller Card - PEXUSB312C3 - Storage Mounts & Enclosures - CDW.com
Amazon.com: PCIe to PCI Adapter Card,PCI Express x1 to PCI Single/Double Converter,PCI-e Extender Card with USB3.0 Cable for Desktop Sound Card (PCIe to Single PCI Slot) : Electronics