JMT NVMe M2 Key-M to PCI-e 4.0 4X 1X Slot Riser Card with 4 Pin MOLEX Power | eBay
Quad NVMe PCIe Adapter, RIITOP 4 Port M.2 NVMe SSD to PCI-e 4.0/3.0 x16 Card with Fan for 2230/2242/2260/2280 SSD (PCI-e Bifurcation Required) - Newegg.com
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: DAUERHAFT M2 NVMe SSD to PCIE X16 Adapter Card, 4 Port M Key Hard Drive Converter Reader Expansion Card with 4 LED Indicators, Supports PCIE 3.0, 4.0 Transmission Protocol(ph44) : Electronics
x4 PCI Express to M.2 PCIe SSD Adapter - Drive Adapters and Drive Converters | Hard Drive Accessories | StarTech.com Europe
M.2 Moving Toward Gen 4 Gen 5 and How M.2 Socket Development | Argosy Research Inc.|DDR5 Socket Maker and Spec. Definer with JEDEC and Intel