StarTech.com 4-port PCI Express LP USB Adapter Card - Add 4 USB 2.0 ports to your low profile/small form factor computer through a PCI Express expansion slot - pci express usb 2.0
5-port (4+1) USB 2.0 (SD-VIA-5U)
Amazon.com: StarTech.com 7 Port PCI USB Card Adapter - PCI to USB 2.0 Controller Adapter Card - Full Profile Expansion Card (PCIUSB7) : Electronics
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
USB2.0 6Ports Card – FREX Online Store
StarTech.com 2-Port USB PCIe Card 10Gbps/port - USB 3.1 Gen 2 Type-A PCI Express 3.0 Host Controller - PEXUSB312A3 - Storage Mounts & Enclosures - CDW.com
2 Port USB 3.0 x1 PCIe Internal Card – VisionTek.com
StarTech.com 4 Port USB 2.0 PCIe Card - Low Profile (PEXUSB4DP)