M.3 Golden Finger to M.2/M.3 NVME SSD Adapter - Walmart.com
MacBook M.2 NVME Upgrade Adapter - Micro Connectors, Inc.
Connect a M.2 (B & M) key SSD into a B socket - Super User
Amazon.com: M.2 SATA SSD to USB 3.0 External SSD Reader Converter Adapter Enclosure with UASP, Support NGFF M.2 2280 2260 2242 2230 SSD with Key B/Key B+M(Can't Fit for PCIe NVMe/PCIe AHCI
YEUHTLL Full Speed PCIE to M2 Adapter NVMe SSD M2 PCIE X1 Raiser PCI-E PCI Express M Key Connector Supports 2230 2242 2260 2280 M.2 SSD - Walmart.com
Understanding M.2, the interface that will speed up your next SSD | Ars Technica
Adapter - M.2 SATA SSD to SATA - Drive Adapters and Drive Converters | StarTech.com