8GB 2x 4GB / 2GB DDR3 1066MHz PC3-8500S 1.5V SO-DIMM RAM Laptop per Crucial IT | eBay
Komputerbay 8GB (2X 4GB) DDR3 SODIMM (204 pin) Made with Hynix semiconductors 1333Mhz PC3 10600 8 GB with SODIMM Heatsink for Extra Cooling (8-8-8-24) at Amazon.com
Kingston Technology ValueRAM 8GB Kit (2x4GB) DDR3 1333 MHz DIMM Desktop Server Memory KVR1333D3E9SK2/8G at Amazon.com