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 -
Fusion Dual U.2 SSD PCIe Card - SONNETTECH
Amazon.com: DiLiVing PCIe NVMe SSD Adapter with U.2 (SFF-8639) Interface for 2.5" NVMe SSD(PEX4SFF8639) : Electronics
D7-P5620 Mid-Endurance PCIe 4.0 NVMe SSD for data centers | Solidigm D7 SSD
Cheap M.2 SSD to U.2 Adapter 2in1 M.2 NVMe and SATA-Bus NGFF SSD to PCI-e U.2 SFF-8639 Adapter PCIe M2 Converter for Desktop | Joom