OWC Announces First 1TB and 2TB SSD Upgrades for 2013 Mac Pro - MacRumors
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
APPLE iMAC i7 21.5" Late 2013 16 GB RAM 1TB HDD 128 GB SSD 3.1 GHZ NVIDIA GT | eBay
How to Install an SSD Card into a 21.5-inch iMac (Late 2012–Early 2013) iMac13,1 - YouTube
MacBook Pro: DIY Storage Upgrade to 1TB SSD | by Leland Zach | Mac O'Clock | Medium
NEW 1TB SSD For 2013 - 2017 MacBook Air A1465 A1466 EMC 3178 2924 2925 IMAC | eBay
Macbook Air SSD 512gb 1tb For 2013 2015 2017 Air A1465 A1466 Macbook Pro A1502 A1398 1TB IMac A1419 A1418 Solid State Drive HD - AliExpress
Apple iMac (27-inch, September 2013) review: New processors and faster Wi-Fi for Apple's slim desktop - CNET