iMac | 2.26 GHz Core 2 Duo | 20 Inch | Mid 2009 - Techable.com
OWC 6GB (2GB + 4GB) PC8500 DDR3 1066MHz SO-DIMMs Memory Compatible with Late 2008, Early 2009, Early 2010 MacBook, MacBook Pro Unibody Models, 2009/2010 Mac Mini, 2009 iMac Models at Amazon.com
iMac 21.5″ Late 2009 to Mid 2011 – Apple Rescue of Denver
Apple iMac 21.5-inch 3.06GHz Core 2 Duo (Late 2009) MB950LL/A | mac of all trades
Timetec 16GB KIT(4x4GB) Compatible for Apple DDR3 1067MHz / 1066MHz PC3-8500 CL7 Dual Rank for iMac (Late 2009 21.5-inch / 27-inch) SODIMM Memory MAC RAM Upgrade for iMac 10,1 and iMac 11,1 at Amazon.com