Amazon.com: OWC SSD Upgrade Kit for 2011 21.5-inch iMacs, Mercury Electra 250GB 6G SSD, 18" SATA III 6Gbps Data Cable, Installation Tools and iMac Screen Adhesive Tape Set : Electronics
OWC DIY Drive Upgrade/Install Kits for Apple iMac Models
SATA Blade SSD Module - Dual SSD Drive Kit for iMac 27 Inch 2012 Model - Walmart.com