OEMPCWorld.com: Transcend TS512GMTE110S HVW 512GB M.2 2280 Nvme PCIe 3.0 x4, M-Key, 3D TLC, DRAM-less Internal SSD R
Amazon.com: Cloudeck NVMe SSD 512GB PCIe Gen3x4 Internal Solid State Drive with 3D NAND for MacBook Air (Mid 2013-2017), MacBook Pro(Retina, Late 2013-Mid 2015), Mac Pro(2013) & Mini (2014), iMac(2013-2017) : Electronics