The Dell 4x m.2 PCIe x16 version of the HP Z Turbo Quad Pro
Amazon.com: NVME PCIe x16 Adapter, Electop M.2 Key-M SSD to PCI 3.0 Express Expansion Card, Support 2230 /2242/2260 /2280 with Heat Sink, Compatible with Windows XP / 7/8 / 10 & MAC OS System : Electronics
Amazon.com: ADT-Link M.2 NGFF NVMe Key M Extender Cable to PCIE x16 Graphics Card Riser Adapter 16x PCI-e PCI-Express for M2 2230 2242 2260 2280 (25cm) : Electronics
ORICO M.2 NVME to PCI-E 3.0 X16 Expansion Card (PSM2-X16)
Amazon.com: M.2 NVMe SSD NGFF to PCIE 3.0 X16 /X4 Adapter M Key Interface Card Support PCI Express 3.0 x4 2230-2280 Size m.2 Full Speed (Black Gold) : Electronics
DELOCK 89044: PCIe x16 > 4x internal NVMe M.2 Key M at reichelt elektronik
2.5IN U 2 NVME TO PCIE X16 CARD, Academic Discount | Education Discount at JourneyEd.com
PCIe x16 ASM2824 to 4 port M.2 NVMe SSD Adapter expansion card Quad mkey nvme to pci e converter|Add On Cards| - AliExpress