OWC / Other World Computing Internal SSD DIY Kit with Tools for 21.5" Apple iMac 2011 Models - Walmart.com
Amazon.com: OWC Data Doubler Kit for 2009-2011 iMac, 1.0TB 3G SSD with Mounting Solution and Toolkit : Electronics
OWC DIY Drive Upgrade/Install Kits for Apple iMac Models
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