StarTech 4-Port PCI Express Low-Profile High-Speed USB PEXUSB4DP
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
StarTech PEXUSB4DP 4 Port PCI Express Low Profile High Speed USB Card - PCIe USB 2.0 Card - PCI-E USB 2.0 Card Add-On Cards - Newegg.com
Allegro USB 2.0 PCI Computer Card - Sonnet
4 Port USB 2.0 PCI Card
StarTech.com 2 Port PCI Express (PCIe) USB 3.0 Card with UASP - LP4 Power - PEXUSB3S25 - Storage Mounts & Enclosures - CDW.com