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" Laptop - 2.5GHz Dual-Core i5 - 8GB RAM - 500GB HDD- (Mid 2012) - Silver - Best Deal in Town
CMS 16GB (2X8GB) DDR3 12800 1600MHz Non ECC SODIMM Memory Ram Upgrade Compatible with Apple® MacBook Pro Core I5 2.5 13" Mid-2012 - A7 at Amazon.com
A-Tech 16GB Kit (2x8GB) RAM for Apple MacBook Pro (Mid 2012), iMac (Late 2012, Early/Late 2013, Late 2014, Mid 2015), Mac Mini (Late 2012) | DDR3 1600MHz SODIMM PC3-12800 204-Pin SO-DIMM Memory Upgrade
iMac RAM for Model 13.2 to 15.1| DDR3-1600MHz | 4GBx2 | MacMemory.com
Amazon.com: Timetec 8GB KIT(2x4GB) Compatible for Apple DDR3L 1600MHz for Mac Book Pro (Early/Late 2011,Mid 2012), iMac(Mid 2011,Late 2012,Early/Late 2013,Late 2014,Mid 2015), Mac Mini(Mid 2011,Late 2012) MAC RAM : Electronics
OFFTEK 4GB Replacement Memory RAM Upgrade for Apple MacBook Pro 2.5GHz Intel Core i5 - (13-inch) (DDR3) (Mid-2012) (DDR3-12800) Laptop Memory
Samsung ram Memory 8GB kit (2 x 4GB) DDR3 PC3-12800,1600MHz for 2012 Apple MacBook
MacBook Pro 15" Retina Display Mid 2012 Teardown - iFixit
So I assembled a Specced Out Unibody MacBook Pro 15-inch (mid-2012, 2.6GHz Core i7, 16GB 1600MHz DDR3 RAM) and installed some gradient colored backlight keyboard on it… : r/mac
Now Here's a MacBook Pro That's Easy to Repair | WIRED