x4 PCI Express to M.2 PCIe SSD Adapter - Drive Adapters and Drive Converters | StarTech.com
M.2 SSD Card 1x PCIe (NVMe) 2x SATA M.2 - SATA Controller Cards | StarTech.com
M.2 SSD Options for the Skylake NUC - Choosing the Right SSD for a Skylake-U System
Amazon.com: GLOTRENDS M.2 PCIe X1 Adapter with M.2 Screw for M.2 PCIe 4.0/3.0 SSD (NVMe/AHCI Key M), PCIe X1/X4/X8/X16 Lane Installation, but Only PCIe X1 Bandwidth (PA09-X1) : Electronics
M.2 PCIe X4 Adapter with M.2 Heatsink for M.2 PCIe 4.0/3.0 SSD