256GB PCIe Blade SSD Kit - Apple iMac 21.5" A1418 Late 2013,Mid 2014,2015 4K | eBay
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
How to Upgrade/Replace the PCIe SSD in a 21.5-in iMac (2019)
2013 iMac teardowns reveal SSD slots, soldered-in CPU in the 21.5” model | Ars Technica
iMac 2013 (and later) with NVME SSD? | MacRumors Forums
Amazon.com: Timetec 256GB MAC SSD NVMe PCIe Gen3x4 3D NAND TLC Read Up to 1,950MB/s Compatible with Apple MacBook Air (2013-2015, 2017), MacBook Pro (2013-2015), iMac (2013-2019), Mac Pro (2013), Mac Mini (2014) : Electronics
How to Install a PCIe SSD in a 27-inch iMac (Late 2013)
IMac's upgrade PCI-e SSD - Apple Community
Genuine Apple 4TB (2x2TB) PCIe SSD for: 2017 iMac Pro A1862; 2019 Mac Pro A1991 | eBay
128GB FUSION DRIVE PCIe SSD Apple iMac 21.5" A1418,27" A1419 Late 2013,2014,2015 | eBay
NGFF/NVMe M.2 2280 SSD Converter for MACBOOK Air/Pro 2013 2014 2015 2016 2017 A1465 A1466 A1398 A1502 iMAC A1418 Mac mini A1347 (SSD is not included) - WIT Computers
Upgrading a 27-inch iMac 5K to 14 terabytes - Replacing the Fusion Drive with both a SSD and an harddisk
For iMac Mac mini Macbook Pro and Retina Mac Pro SSD FASTEST PCIe 3.0 x4 POLARIS NVMe FLASH SSD 32GB 128GB 256GB 512GB 1TB 2TB - AliExpress Computer & Office
Upgrading an older iMac's PCIe SSD: Third-party solutions that save you beaucoup bucks
Kingspec 256GB 512GB 1TB M2 PCIe NVME SSD For 2013 2015 Macbook Pro Retina A1502 A1398 Macbook Air A1465 1466 SSD iMac A1419 SSD|Internal Solid State Drives| - AliExpress