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 :
ST PEXM2SAT32N1: M.2 SSD card 1x PCIe (NVMe) 2x SATA M.2 at reichelt elektronik
Coolbox COO-ICPE-NVME SSD M.2 NVME Slot PCI-E Black | Techinn
Quad M.2 PCIe Adapter for NVMe/AHCI SSD - Drive Adapters and Drive Converters | StarTech.com
Amazon.com: Sedna - PCI Express (PCIe) Dual 2.5 Inch SATA III (6G) SSD Adapter (Short Double Side SSD Version) (with Built in Power Circuit, no Need SATA Power Connector, Best for Mac),
U.2 SFF-8639 NVMe SSD to PCI-e 4X Adapter. PC PitStop Data Storage Solutions - SAS Enclosures, DAS, NAS, iSCSI & FC SAN