Other World Computing - DDR3 - kit - 8 GB: 2 x 4 GB - SO-DIMM 204-pin - 1066 MHz / PC3-8500 - CL7 - 1.5 V - unbuffered - non-ECC - Walmart.com
Crucial 16GB Kit (2 x 8GB) DDR3L-1600 SODIMM Memory for Mac | CT2K8G3S160BM | Crucial.com
Timetec Hynix IC DDR3L 1600MHz PC3L-12800 SODIMM Compatible with Apple 2011, 2012, 2013, 2014 MacBook Pro, iMac, Mac mini (16GB Kit(2x8GB)) - Newegg.com
Timetec Hynix IC 8GB Compatible for Apple DDR3L 1600MHz PC3L-12800 SODIMM Memory Upgrade for Early/Mid/Late 2011, Mid/Late 2012, Early/Late 2013, Late 2014, Mid 2015 MacBook Pro, iMac, Mac Mini (8GB) - Newegg.com