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 PC SN520 NVMe SSD + 2280 Çevirici Metal Aparat WD SDAPMUW-256G 256 Gb
Amazon.com: PCIe Gen3 x2 USB 3.2/3.1 Card ASM3142- PCI Express to 4-Port Type C HUB Internal Expansion Card Controller Adapter PCI Express Card Desktop PC Support Multiple INs : Electronics
What is the difference between PCIe Gen 3 X2 and X4 SSDs? Can these two SSDs be used for laptops that support the PCIe interface? - Quora
ULANSeN PCIe Gen3 x2 USB 3.2/3.1 Card ASM3142- PCI Express India | Ubuy
ECS06
PCI-E X2 2.5 inç SATA3.0 RAID denetleyici kartı SSD HDD 88SE9230 yonga seti 2 port Sata 3.0 pcie raid kartı 6gbps Gen 3 - AliExpress