OWC 16GB (2x8GB) ram Upgrade PC3-12800 DDR3L 1600MHz sodimm 204 Pin CL11 Memory Upgrade Kit Compatible with Late iMac, Mac Mini, and MacBook Pro Computer at Amazon.com
Transcend TS512MSK64W6H 4GB DDR3L 1600 SO-DIMM Memory Module at Amazon.com
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
HP 8GB (1 x 8GB) PC3L-12800 DDR3L-1600 SODIMM for Notebooks [PN: 693374-001 / 693374-005] at Amazon.com