Timetec 16GB KIT(2x8GB) Compatible for Apple DDR3L 1600MHz for Early/Mid/Late Mac Book Pro(2011-2012), iMac(2011-2015), Mac Mini(2011-2012) MAC RAM at Amazon.com
Apple MacBook Pro (Early 2011) 17-inch 2.3 GHz 8GB RAM 1TB SSD
MacBook Pro 13" Unibody Early 2011 RAM Replacement - iFixit Repair Guide
Apple MacBook Pro (13-inch Late 2011) 2.8 GHz i7-2640M 8GB RAM 512GB S
A-Tech 16GB (2x8GB) RAM for Apple MacBook Pro (Early/Late 2011), iMac (Mid 2010 27 inch 4-Core, Mid 2011 21.5/27 inch), Mac Mini (Mid 2011) | DDR3 1333MHz PC3-10600 204-Pin SODIMM Memory Upgrade Kit at Amazon.com