Now Here's a MacBook Pro That's Easy to Repair | WIRED
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 PC3-12800 SODIMM 204-Pin Memory Upgrade at Amazon.com
Memory RAM Upgrades for MacBook Pro (2012 - Late 2016)
MacBook Pro 15" Retina Display Mid 2012 Repair - iFixit
MacBook Pro 15" Retina 2.7GHz Logic Board, Mid 2012 DIY Parts replacement Logic Boards
MacBook Pro (15-inch, Early 2011/Late 2011/Mid 2012, A1286) - Dr. Macbook Thailand
MacBook Pro RAM Upgrades (Non-Retina) - OWC
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
16 GB RAM Upgrade on MacBook Pro 15" (mid 2012) NON Retina - YouTube
16GB MacBook Pro RAM Upgrade (2011/2012/2013) - YouTube