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
16GB (2 X 8GB) DDR3 1066MHz PC3-8500 240-pin Memory RAM DIMM for Desktop by NEMIX RAM at Amazon.com
Komputerbay 16GB Dual Channel Kit 2X 8GB 204pin DDR3-1066 SO-DIMM 1066 PC3-8500 (1066MHz, CL7) for Apple at Amazon.com
8GB (2 X 4GB) DDR3 1066MHz PC3-8500 240-pin Memory RAM DIMM for Desktop PC