Amazon.com: Tripp Lite U.2 to PCIe Adapter for 2.5″ NVMe U.2 SSD, SFF-8639, PCI Express Card, Supports U.2 SSDs and SATA I/II/III SSDs & HDDs, Backward Compatible with PCIe 2.0 & 1.0,
Weastlinks U2 PCI-Express 3.0 4x X16 to U2 SFF-8639 Adapter NVMe PCIe SSD PCI-e to U.2 Card M.2 NGFF 2.5 SSD TO PCI-E X16 - Newegg.com
Amazon.com: PCIE to U.2 Adapter Card, PCIE X16 to 4 Port U.2 NVME SFF-8643/8639 Expansion Card, PCIE 4.0 U.2 Split Card with LED Indicator for Windows : Electronics
PCIe 3.0 to (2) U.2 SFF-8639 Adapter, X8, for 2.5'' U.2 NVMe SSD or 2.5" SATA SSD
Amazon.com: U.2 SFF-8639 to PCIe NVMe SSD Adapter Card, PCIe 3.0 X4 Expansion Card for 2.5" U.2 NVMe SSD or 2.5" SATA SSD : Electronics
Adapter, M.2 to U.2 - M.2 PCIe NVMe SSDs - Drive Adapters and Drive Converters | Hard Drive Accessories | StarTech.com Europe