StarTech.com Dual M.2 PCIe 4.0 x8 x16 to Dual NVMe or AHCI SSD (DUAL-M2 -PCIE-CARD-B)
Amazon.com: TEAMGROUP MP44S High Performance SSD 2TB SLC Cache Gen 4x4 M.2 2230 PCIe 4.0 NVMe, Compatible with Steam Deck, ASUS ROG Ally, Mini PCs (R/W Speed up to 5,000/3,500MB/s) TM5FF3002T0C101 :
KingSpec SSD M.2 NVME 256G 512GB 1TB 2TB 4TB M2 2280 PCIe 4.0 SD Nmve Gen4 Hard Disk Drive Internal Drives for Laptop PC - AliExpress