Crucial 8GB Memory Upgrade for Apple MacBook Pro 13 inch (Mid 2012) PC3-12800S 1600MHz DDR3 SODIMM RAM (Crucial CT8G3S160BM Equivalent) - Newegg.com
Adamanta 16GB (2x8GB) Apple Memory Upgrade DDR3L 1600MHz SODIMM Compatible for iMac (Mid 2011, Late 2012, Early/Late 2013, Late 2014, Mid 2015), MacBook Pro (Early/Late 2011, Mid 2012), Mac Mini at Amazon.com
Apple MacBook Pro 13.3" (500GB HDD, Intel Core i5 3rd Gen., 2.5GHz, 4GB RAM) Laptop - Silver - MD101LL/A (Mid 2012) for sale online | eBay
OWC 16GB (2x8GB) ram Upgrade PC3-12800 DDR3L 1600MHz sodimm 204 Pin CL11 Memory Upgrade Kit Compatible with Late iMac, Mac Mini, and MacBook Pro Computer at Amazon.com