Amazon.com: Timetec 8GB KIT(2x4GB) Compatible for Apple DDR3 1333MHz PC3-10600 for Mac Book Pro (Early/Late 2011 13/15/17 inch), iMac (Mid 2010, Mid/Late 2011 21.5/27 inch), Mac Mini(Mid 2011) RAM Upgrade : Electronics
4GB (1x4GB) DDR3-1333MHz PC3-10600 2Rx8 SODIMM Laptop Memory by NEMIX RAM at Amazon.com
Arch Memory Replacement for Lenovo 4GB 204-Pin DDR3 1333 MHz So-dimm RAM at Amazon.com
Adamanta 8GB (1x8GB) DDR3 1333Mhz PC3-10600 SODIMM 2Rx8 CL9 1.5v Notebook Laptop Memory Upgrade RAM DRAM at Amazon.com