StarTech.com 4x PCI-Express controller card (2x M.2 SATA III 1x M.2 PCI-e NVMe) - Controller card StarTech.com on LDLC
Amazon.com: ASUS Hyper M.2 X16 PCIe 4.0 X4 Expansion Card Supports 4 NVMe M.2 (2242/2260/2280/22110) up to 256Gbps for AMD 3rd Ryzen sTRX40, AM4 Socket and Intel VROC NVMe Raid : Electronics
Amazon.com: SSD Expansion Card, M Key NVMe M.2 to PCIE 4X High Speed Good Performance Adapter Card, Supports High Speed Mass Storage Interface : Electronics
The Dell 4x m.2 PCIe x16 version of the HP Z Turbo Quad Pro
x4 PCI Express to M.2 PCIe SSD Adapter - Drive Adapters and Drive Converters | StarTech.com