Low-Profile M.2 NVMe SSD to PCIe x4 Adapter with Heat Sink for 1U - Micro Connectors, Inc.
NVMe external adapter U.2 (SFF-8639) to NVMe M.2 and PCIE x4 slot
Newest NGFF M.2 to PCI E 4X Riser Card M2 M Key to PCIe X4 Adapter with LED Indicator SATA Power Riser for Bitcoin Miner Mining|Add On Cards| - AliExpress
Amazon.com: M.2 NVMe SSD NGFF to PCIE 3.0 X16 /X4 Adapter M Key Interface Card Support PCI Express 3.0 x4 2230-2280 Size m.2 Full Speed (Black Gold) : Electronics
M Key M.2 PCIe NGFF SSD to PCI-e Express 3.0 x4 Adapter Card Controller with Heatsink for 2230 2242 2260 2280 mm M Key M.2 PCIe Based AHCI NVMe SSD - Newegg.com