x4 PCI Express to M.2 PCIe SSD Adapter - Drive Adapters and Drive Converters | StarTech.com
1TB BOOTABLE ULTRA-FAST SSD NVME PCI Express x4, 1500MB/s Mac Pro 4.1 or 5.1 | eBay
How to install and boot a Dell PowerEdge from a PCIe NVMe drive
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 :
Amazon.com: Ableconn PEXM2-SSD M.2 NGFF PCIe SSD to PCI Express x4 Host Adapter Card - Support M.2 PCIe (NVMe or AHCI) Type 2280, 2260, 2242 - PCIe SSD M.2 Adapter - PCIe
AXAGON PCEM2-S PCIe-3.0-x16-Adapter, 1x M.2-NVMe-SSD, bis 2280 - passive Kühlung