SilverStone Technology ECS06 6 Port SATA Gen3 (6Gbps) Non-RAID PCI Express Gen3 x2 Card - Walmart.com
I harvested a PCIe Gen3 x2 NVMe 1.3 SSD from my older laptop, the problem is that its length is short. I've held it in place with some tape, it should hold.
Western Digital SDAPMUW-512G 512GB PC SN520 PCIe Gen3 x2 NVMe V1.3 M.2 2242 Internal Solid State Drive - Newegg.com
PCIe Gen3 x2 USB 3.2 / 3.1 Card ASM3142- PCI Express to 4-Port Type C HUB
SDAPNUW-256G Western Digital PC SN520 256GB M.2 2280 Pcie GEN3 X2 SSD L18845-002 M.2 SSD / Solid State Drive - Newegg.com
Amazon.com: LINKUP - NVMe Enclosure M.2 SSD to USB C 10Gbps Adapter | Aluminum Case USB 3.1 Gen 2 (10 Gbps) to PCIe Gen3 x2 Bridge Chip | for Windows & Mac
Amazon.com: QNAP QM2-2P2G2T2 x PCIe Gen3 M.2 NVMe SSD & 2 x 2.5GbE Port Expansion Card to Enhance Performance : Electronics