Amazon.com: Sedna PCI Express (PCIe) SATA III (6G) SSD Adapter with 1 SATA III Port (with Built in Power Circuit, no Need SATA Power Connector, Best for Mac), SSD not Included :
Low-Profile M.2 NVMe SSD to PCIe 4.0 Adapter with Heat Sink for 1U - Micro Connectors, Inc.
Quad NVMe PCIe Adapter, RIITOP 4 Ports M.2 NVMe SSD to PCI-e 4.0/3.0 x