Timetec 256GB MAC SSD NVMe PCIe Gen3x4 3D NAND TLC Internal SSD Compatible with Apple MacBook Air (2013-2015, 2017), MacBook Pro (2013-2015), iMac (2013-2019), Mac Pro (2013), Mac Mini (2014) - Walmart.com
Amazon.com: OWC 2TB Aura Pro X2 NVMe SSD Upgrade Kit Compatible with Select 27" and 21.5" iMac Models (Late 2013 - Current) : Electronics
SSD Upgrades for Apple iMac 27-Inch Late 2013 - 2019
Amazon.com: Timetec 512GB MAC SSD NVMe PCIe Gen3x4 3D NAND TLC Read Up to 2,000MB/s Compatible with Apple MacBook Air (2013-2015, 2017), MacBook Pro (2013-2015), iMac (2013-2019), Mac Pro (2013), Mac Mini (2014) : Electronics
A list of successful iMac 27" (2012-2019) SSD upgrades | Page 39 | MacRumors Forums
How to Install/Upgrade the PCIe SSD in a 27-inch iMac (2019) iMac19,1 - YouTube
Amazon.com: LEVEN 1TB Mac Upgrade NVMe SSD PCIe Gen3x4 Compatible with Apple MacBook Air (2013-2017) & Pro (2013-2015), Mac Mini (2013) & Pro (2014), iMac (2013-2019) : Electronics
Imac 2019 2tb + fusion drive, nvme ssd swap to samsung 960 pro | MacRumors Forums
M.2 NVMe SSD adapter for Apple MacBook Air/Pro, iMac, Retina iMac 4K/5K, Mac Pro | eBay
Apple 2TB SSD sspolaris MZ-KKW2T00/0A8 iMac 2019 2017 2015 655-1996 Original | eBay