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
Timetec Hynix IC 8GB KIT(2x4GB) Compatible for Apple DDR3L 1600MHz PC3L-12800 for Early/Mid/Late 2011, Mid/Late 2012, Early/Late 2013, Late 2014, Late 2015 MacBook Pro, iMac, Mac Mini (8GB KIT(2x4GB)) - Walmart.com
OWC 8GB (2 x 4GB) PC12800 DDR3L 1600MHz SO-DIMMs Memory Compatible with 2011-2015 iMac, 2011-12 Mac Mini, and 2011-2012 MacBook Pro (Non-Retina Display) Models (OWC1600DDR3S08S) at Amazon.com