OWC DIY Drive Upgrade/Install Kits for Apple iMac Models
iMac (circa 2009) Hard Drive to SSD Upgrade - YouTube
OWC SSD Upgrade Kit For 2010 27-inch iMacs, OWC Mercury Electra 250GB 6G SSD, 18" SATA III 6Gbps data cable, SSD Power Cable, Installation tools and iMac screen adhesive tape set :
Upgrade the Hard Drive in 2009 and Later iMacs
How-To: Now's the right time to swap your old iMac's hard drive for a fast new SSD - 9to5Mac