M.2 NVMe SSD Adapter M2 to PCIE 3.0 X16 Controller Card M Key Interface Support PCI Express 3.0 x4 2230-2280 Size - AliExpress
MAIWO M.2 expansion card KT058A NVMe SSD to PCIe 3.0 X16/X8/X4 adapter M Key Converter Card Support 2230 2242 2260 2280,Compatible with Windows 7/8/10 & Linux ,BTC accessories - Newegg.com
PCIe 3.0 X16 PLX8747 to 4 Port M.2 NVMe SSD Adapter Expansion Card Quad Mkey Nvme to Pci-E Converter for PC 32G/bps win10 linux - AliExpress
4 Port PCIe 3.0 x16 to U.2(SFF-8643) NVMe SSD Adapter
M.2 NVMe SSD to PCI-E 3.0 X16/X8/X4 Adapter for PC | eBay