iMac Intel 21.5" and 27" (Mid 2011) SSD Upgrade Bundle - iFixit Store
OWC Hard Drive Upgrade Kit for Apple iMac 2011
2011 imac 27" 32GB - final stage of 1TB + 2TB SSD upgrade (replaced HDD & optic drive). Also cleaned out the fans and case. Running 'SSD Fan Control' & 'Macs Fan
How-To: Now's the right time to swap your old iMac's hard drive for a fast new SSD - 9to5Mac
Install SSD iMac 2011 - How-To DIY Guide Tutorial
OWC DIY Kit for all Apple iMac 2011 for replacing the main hard drive
iMac Mid 2011のHDDをSSDに換装する方法 – あの角を曲がれば、かぼしー
How-To: Now's the right time to swap your old iMac's hard drive for a fast new SSD - 9to5Mac