Amazon.com: 8GB 2 X 4GB DDR3 PC3-8500 1066MHz SODIMM Memory RAM for Apple iMac Intel Core 2 Duo 20" inch 24" inch (Early 2009) Equivalent to MC016G/A (PARTS-QUICK BRAND) : Electronics
Elpida 2GB DDR3 PC3-10600 SDRAM SO-DIMM Memory at Amazon.com
SAMSUNG 8GB DDR3 SO-DIMM Memory Module at Amazon.com