OWC Announces First 1TB and 2TB SSD Upgrades for 2013 Mac Pro - MacRumors
1TB Mercury Extreme SSD and HDD Kit for 27-inch iMac
IMAC 27" 2013 | i7 | 1TB SSD | 32GB RAM – TECPUTE
NEW M.2 PCIe NVME 256GB 512GB 1TB SSD For 2013 2014 2015 Macbook Pro Retina A1502 Macbook Air A1466 SSD iMac A1418 A1419 SSD|Internal Solid State Drives| - AliExpress
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 21.5-inch and 27-inch (Late 2013) reviews | Macworld
iMac 27" 2013 SSD upgrade - IT-Tech Online
Apple iMac (27-inch, September 2013) review: New processors and faster Wi-Fi for Apple's slim desktop - CNET
Odyson - 1TB SSD (PCIe 3.0 x4, SSUBX) Replacement for MacBook Pro, iMac, Mac Pro, Mac Mini (Late 2013-2015) : Electronics
iMac (27-inch, Late 2013) 1TB SSD Upgrade - NiwTech