Timetec 1TB MAC SSD NVMe PCIe Gen3x4 3D NAND TLC Read Up to 1,900MB/s Compatible with Apple MacBook Air (2013-2015, 2017), MacBook Pro (2013-2015), iMac (2013-2019), Mac Pro (2013), Mac Mini (2014) - Newegg.com
1TB SSD Pcie MZ-KPU1T0T/0A6, SM1024F for Apple iMac 21.5-inch A1418 Retina(Late 2013 – Late 2015), iMac 27-inch A1419 Retina(Late 2013 – Late 2015), Mac mini (Late 2014), Mac Pro (Late 2013), MacBook
OWC SSD Upgrade Kits For Mac Pro Cylinder 2013
How to Install/Upgrade the PCIe SSD in a 27-inch iMac (Late 2013) iMac14,2 - YouTube