PCI-E Express X1 to Dual PCI Riser Card with USB 3.0 Port
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
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
NeweggBusiness - StarTech.com PCI Express to PCI Adapter Card Model PEX1PCI1