From Amazon
StarTech.com M2 PCIe SSD Adapter - x4 PCIe 3.0 NVMe / AHCI / NGFF / M-Key - Low Profile and Full Profile - SSD PCIe M.2 Adapter (PEX4M2E1)
Memory C
StarTech.com x4 PCI Express to M.2 PCIe SSD Adapter
This product is also available at 8 unverified merchants.