Amazon.com: Kingwin USB 3.0 Dual Port PCI Bracket Cable with Built-In-20-Pin Header, Up to 5 Gbps for Maximum Transfer Speed, Extend Your USB 3.0 Port On Motherboard to Back of Your Computer
Amazon.com: StarTech.com 7 Port PCI Express USB 3.0 Card - 5Gbps - Standard & Low-Profile - SATA Power - UASP Support - 1 Internal & 6 External USB 3.0 Ports (PEXUSB3S7) : Electronics