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 :
4 Port PCIe 3.0 x16 to U.2(SFF-8643) NVMe SSD Adapter
PCI-Express SSD and SATA SSD. Which is Better?
U.2 SFF-8639 NVMe SSD to PCI-e 4X Adapter. PC PitStop Data Storage Solutions - SAS Enclosures, DAS, NAS, iSCSI & FC SAN
Controller Card - PCIe 2x M.2 SATA SSD - SATA Controller Cards | StarTech.com
Intel SSD 750 PCIe SSD Review: NVMe for the Client