12GB OWC Memory Upgrade Kit (1 x 4GB + 1 x 8GB) 1867MHZ PC3-14900 DDR3 SO-DIMM | Megamac
Axiom 12GB DDR3 1333MHz Memory (SO.D98GB.M2R-AX) | Best Buy Canada
OWC 12GB (8GB+4GB) PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 Memory Upgrade Kit Compatible with iMac, Mac Mini, and MacBook Pro (OWC1600DDR3S12S) at Amazon.com