maxupgrades.com: Single SSD Drives kit for iMac 27 inch 2012 Models with SATA Blade SSD Module / Heatsink/ Power Cable and DATA Cables for [SSD + HDD] with iMac Adhesive LCD Tape
SSD Upgrade Kits for 27-Inch iMac (2012 - Early 2013)
DIY SSD upgrade kit for late 2013-2019 iMac|iMac late 2013-2019 SSD with upgrade kit|Flexx Memory|Free UK Delivery
OWC SSD Upgrade Kits for 21.5-Inch iMac (2013 - 2019)
SSD Upgrades for Apple iMac 27-Inch Late 2013 - 2019