OWC DIY Drive Upgrade/Install Kits for Apple iMac Models
iMac 2012-2017 SSD Upgrade - YouTube
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