Amazon.com: ADT-LINK PCIe X8 to X8 Adapter Cable for Graphics Video Card PCI Express Extender PCIe X8 to PCIe X8 Slot Extension Cable for 1U 2U Server (5CM) : Electronics
PCIe to SFF-8639 Adapter Card PCIe 3.0 x8 to 2x SFF-8639 for 2.5'' U.2 NVMe SSD | eBay
ONE STOP SYSTEMS PCIe 3.0 x8 Dual-Port OSS-PCIE-HIB38-X8-DUAL