Crucial 16GB Single DDR3L 1600 MT/s (PC3L-12800) 204-Pin SODIMM Memory - CT204864BF160B at Amazon.com
NEMIX RAM 16GB (2x8GB Upgrade) DDR3-1333 PC3-10600 204-Pin SODIMM Memory for Apple MacBook Pro Early/Late 2011, iMac Mid 2010 27 inch 4-Core, iMac Mid 2011 21.5/27” , Mac Mini Mid 2011 at Amazon.com