4GB (2X 2GB) DDR2 PC2-6300 PC2-6400 800Mhz 240 Pin DIMM (Desktop Memory) 4 GB KIT (Price Include Tax) at Amazon.com
Amazon.com: High Performance Memory Module for RAM for Intel/AMD (2GB, DDR2,800MHz, 200PIN, PC-6400), Compatible with Your Digital Smart Computer/Computer : Electronics
Komputerbay 4GB Kit (2GBx2) DDR2 800MHz (PC2-6400) CL6 SODIMM 200-Pin 1.8v Notebook Laptop Memory Modules with Lifetime Warranty at Amazon.com