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 -
HPE 1.92TB NVMe Gen4 High Performance Read Intensive SFF SC U.3 PM1733 SSD | HPE Store US
4 solutions tested: Add 2.5" SFF NVMe to your current system
Ableconn Technologies
Iocrest Pcie To U.2 Sff-8643 Gen 3 /4 -lane Card For 2.5" Nvme Ssd With Mini-sas (sff-8643) To U.2 (sff-8639) Cable For Mining - Add On Cards & Controller Panels - AliExpress
Dell 1.6TB NVMe Mix Use Express Flash 2.5in SFF Drive , U.2, P4610 with Carrier | Dell USA
Cy Sff-8639 Nvme U.2 To Ngff M.2 M-key Pcie Ssd Adapter For Mainboard Replace Intel Ssd 750 P3600 P3700 - Pc Hardware Cables & Adapters - AliExpress
how to install intel optane nvme u.2 8639 ssd into pcie slot