GLOTRENDS M.2 PCIe NVMe 4.0/3.0 Adapter with 0.12 Inch Thick M.2 Heatsink for M.2 PCIe SSD (NVMe and AHCI), PCI-E GEN4 Full Speed, Desktop PC Installation (PA09-HS) - Newegg.com
PCIe 4.0 NVMe SSDs Start Popping Up At Retail, Boasting ~5GB Read Speeds – Techgage
Amazon.com: Quad M.2 NVME SSD to PCI-E 4.0 X16 Adapter, High Speed 4x32Gbps Soft Raid Card with Individual LED Indicator Support 2230 2242 2260 2280 (ph44) : Electronics
How fast is PCIe 4.0 NVMe vs PCIe 3.0 [BEST NVMe 2019]