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: 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
AliExpress
ORICO M.2 NVME to PCI-E 3.0 X16 Expansion Card (PSM2-X16)