After running into 3.3v requirement limitations over in the Intel DC P3520 thread, I decided to go look for alternatives and stumbled across this listing. I don't pay much attention to SanDisk, and it's IO performance is nothing to write home about.. but it could be a good deal:
Sandisk - Skyhawk "NVMe" PCIe SSD 1.92TB - 2.5in PCIe Ultra NVMe SSD | eBay
Sandisk - Skyhawk "NVMe" PCIe SSD 1.92TB - 2.5in PCIe Ultra NVMe SSD | eBay