Amazon.com: StarTech.com M.2. PCI-e NVMe to U.2 (SFF-8639) Adapter - Not Compatible with SATA Drives or SAS Controllers - For M.2 PCIe NVMe SSDs - PCIe M.2 Drive to U.2 Host Adapter -
U.2 NVMe SSD SFF8643 to SFF-8639 NVMe U.2 with Cable PCIe x16 Quad Port Adapter | eBay
Dell 6.4TB, Enterprise, NVMe, Mixed Use Drive, U.2, Gen4 with Carrier | Dell USA