OWC 8 GB (2 X 4GB) ram PC8500 DDR3 1066MHz sodimm 204-pin Memory Upgrade Kit, (OWC8566DDR3S8GP), Compatible with MacBook Pro, MacBook, Mac Mini and iMac at Amazon.com
8GB, 204-pin SODIMM, DDR3 PC3-14900, at Amazon.com
Amazon.com: Crucial 4GB Single DDR3/DDR3L 1600 MT/s (PC3-12800) SODIMM 204-Pin Memory For Mac - CT4G3S160BM : Everything Else
TECMIYO DDR3L 1600MHZ SODIMM RAM 4GB, DDR3 PC3L-12800S 204Pin Non ECC Unbuffered 1.35V/1.5V CL11 2RX8 Dual Rank for Laptop Notebook Computer Memory Module-Blue at Amazon.com
Samsung 4GB DDR3 Memory SO-DIMM 204pin PC3-12800S 1600MHz at Amazon.com
Samsung 4GB DDR3 PC3-12800 1600MHz 204-Pin SODIMM Laptop Memory Module RAM. Model M471B5273DH0-CK0 at Amazon.com