Amazon.com: PCIe X16 Golden Edge to PCIe X16 Slot Adapter : Electronics
StarTech.com PCI Express X1 to X16 Low Profile Slot Extension Adapter - PCIe x1 to x16 Adapter (PEX1TO162)
PCI-e 3.0 Riser Cable PCI Express x16 High Speed Flexible Jumper, 85 ohms, Using 3M's Twin-ax Cable (Male to Male, 500mm)
Amazon.com: ADT-LINK Riser PCI-E 3.0 16x to x1 PCIe x16 x1 PCI Express Riser Mining Graphics Card Extension Cable R13SC 25cm with Power Line (No Power Cable) : Electronics