M.2 NVMe SSD NGFF to PCIE X4 adapter M Key interface card Support PCI-e PCI Express 3.0 x4 2230-2280 Size m.2 m2 pcie adapter - AliExpress
Delock Products 64131 Delock M.2 Key M to PCIe x4 NVMe Adapter with 20 cm cable
In The Lab: Netstor NP631N M.2 NVMe to PCIe Host Adapter - StorageReview.com
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 -