StarTech.com Dual M.2 PCIe SSD Adapter Card - x8 - x16 Dual NVMe or AHCI M.2 SSD to PCI Express 3.0 - M.2 NGFF PCIe (m-key) Compatible - PCC-IT International
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
iStarUSA One PCIe x16 and Two PCIe x8 Riser Card DD-643655-C7
P27F Series (x16/x8/x4/x1) Flexible x16 PCI Express Extender