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
Kingston Value (KVR16N11/8) RAM 8 GB 1600MHz DDR3 (PC3-12800) Non-ECC CL11 240 Pin DIMM Motherboard Memory at Amazon.com
Amazon.com: Yongxinsheng DDR3 4GBx2 (8GB Kit) 1600MHz PC3-12800 Desktop Memory CL11 240Pin 1.5V Non-ECC Unbuffered Compatible with All Motherboards UDIMM Ddr3 RAM - Black : Everything Else