Upgrade Kit for Apple SSD 256GB NVMe PCIe 3.0 655 1993 MZ KPW2560 for MacBook Pro Retina for Mac Pro for iMac Polaris|Computer Cables & Connectors| - AliExpress
Sintech M.2 nVME SSD Adapter Card Upgrade Kits,Compatible for MacBook Air(2013-2017 Year) and MacBook PRO(Late 2013-2015 Year,iMac : Electronics
Upgrading an older iMac's PCIe SSD: Third-party solutions that save you beaucoup bucks
Amazon.com: OWC 2TB Aura Pro X2 NVMe SSD Upgrade Kit Compatible with Select 27" and 21.5" iMac Models (Late 2013 - Current) : Electronics
Upgrading a 27-inch iMac 5K to 14 terabytes - Replacing the Fusion Drive with both a SSD and an harddisk
NVMe SSD Upgrade on a Late 2012 iMac | MacRumors Forums
How to Install a PCIe SSD in a 27-inch iMac with 5K Display
How to use an NVMe drive to upgrade your Mac's SSD | AppleInsider
Amazon.com: OWC 2TB Aura Pro X2 NVMe SSD Upgrade Kit Compatible with Select 27" and 21.5" iMac Models (Late 2013 - Current) : Electronics
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
2013 iMac teardowns reveal SSD slots, soldered-in CPU in the 21.5” model | Ars Technica
240GB Aura Pro X2 NVMe SSD Complete upgrade kit for select 27" & 21.5" iMac (Late 2013-Current