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 -
AMPCOM M.2 NVME to PCIE Adapter M-Key SSD to PCI-E 4.0 X4 SATA Expansion Card | eBay
U.2 SFF-8639 NVMe SSD to M.2 NGFF PCI-e Adapter with Cable
GLOTRENDS M.2 PCIe NVMe 4.0/3.0 Adapter with 0.12 Inch Thick M.2 Heatsink for M.2 PCIe SSD (NVMe and AHCI), PCI-E GEN4 Full Speed, Desktop PC Installation (PA09-HS) - Newegg.com