USB PCIe Card, 4 Port USB 3.0 to PCI Express Card Expansion card, PCI-E to USB 3.0 4 Port Hub Controller Adapter, TaliaPosy RC-508 PCI-E to USB 3.0 Add On card" - Walmart.com
PCIe X16 Golden Edge to PCIe X16 Slot Adapter
StarTech.com PCI Express (PCIe) to PCI Converter Adapter Card (PEX1PCI1)
PE4 ( PCI-E 16X to expresscard / 34 adaptor with cable )