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
240GB OWC 6G SSD and HDD Kit for 27-inch iMac all 2012 - Mid 2019
Late 2012 Blade SSD in Mid 2011 Imac 27" ? | MacRumors Forums