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IOGEAR - GIC251U - 5-Port USB 2.0 PCI Card
USB 2.0 PCIE PCI-Express x1 card 4 External USB2.0 Ports Moschip with 4pin power supply - AliExpress
StarTech.com 2 Port PCI Express (PCIe) USB 3.0 Card with UASP - LP4 Power - PEXUSB3S25 - Storage Mounts & Enclosures - CDW.com
Amazon.com: GODSHARK Internal USB 2.0 PCI Card, 5 Port (4 External & 1 Internal) PCI Expansion to USB 2 Adapter Hub Controller, High Speed 480Mbps for Desktop : Electronics
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5 Port Hi-Speed USB 2.0 PCI Adapter Card For Apple PowerMac G3 / G4 OS X 10.2.8+ | eBay
StarTech PCI420USB 4-Port PCI USB 2.0 Adapter Card USB Controller Card
EX-11064 | Exsys Interface Card 4x USB 2.0 PCI-E x1 | Distrelec International
4 Independent Port PCIe USB Adapter Card - USB 2.0 Cards | StarTech.com
5 Port PCI USB 2.0 Adapter Card - USB 2.0 Cards | StarTech.com
PCI-E Card to 4 Port USB 3.0/2.0/1.1 Hub Fiber Optic Extender – Transwan
Amazon.com: StarTech.com 4 Port PCI Express Low Profile High Speed USB Card - PCIe USB 2.0 Card - PCI-E USB 2.0 Card (PEXUSB4DP) : Everything Else
Sonnet Technologies Allegro USB 3.2 PCI Express Card