OWC 8GB PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 Memory Module Upgrade Compatible with iMac, Mac Mini, and MacBook Pro (OWC1600DDR3S8GB) at Amazon .com
Hynix 4GB DDR3 Memory SO-DIMM 204pin PC3-12800S 1600MHz at Amazon.com
Samsung 4GB DDR3 Memory SO-DIMM 204pin PC3-12800S 1600MHz at Amazon.com
Rasalas 8GB DDR3 PC3L-12800S 8GB 1600 MHz DDR3 SODIMM RAM for Intel AMD Laptop, MacBook Pro Mid 2012, iMac Late 2012/ Early/Late 2013, Late 2012/2013, Retina 5K Display, Mac Mini at Amazon.com
Samsung original 4GB, 204-pin SODIMM, DDR3 PC3L-12800, ram memory module for laptop ( M471B5173QH0-YK0 ) at Amazon.com