StarTech.com Dual M.2 PCIe SSD Adapter Card, x8 / x16 Dual NVMe or AHCI M.
StarTech.com x4 PCI Express to M.2 PCIe SSD Adapter Card - for M.2, adaptateur m.2 pcie - burgosandbrein.com
Startech Quad M.2 PCIe Adapter Card, x16 Quad NVMe or AHCI M.2 SSD to PCI Expres | eBay
Amazon.com: A ADWITS PCI Express 3.0 4X 8X 16x to M.2 NVMe and AHCI SSD Adapter Card with Heat Sink, Bracket-Free and Compatible with Samsung 960 970 EVO PRO WD Black and