From Amazon
ICY BOX NVMe M.2 SSD to PCIe 4.0 X4 with Aluminium Heat Sink, Adapter Card for Key-M with USB C, IB-PCI208-HS
Conrad Electronic
ICY BOX IB-PCI208-HS, PCIe Erweiterungskarte mit Kuehlkoerper, M.2 NVMe SSD zu PCIe 4.0 x4 1 port M.2 controller PCIe x4 Compatible with: M.2 SATA SSD incl. slot