Transcend PCIe M.2 SSD - 128GB Capacity, M.2 2242 Form Factor, NVMe PCIe Gen3 x2, 3D TLC NAND flash, 1700MB/s Read, 1600MB/s Write, B+M Key - TS128GMTE452T at TigerDirect.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.