Axiom 4GB DDR3 SDRAM Memory Module - 4GB (2 x 2GB) - 1066MHz DDR3-1066/PC3-8500 - DDR3 SDRAM SoDIMM at Amazon.com
Amazon.com: OWC 2GB PC8500 DDR3 1066MHz SO-DIMM Memory Compatible with Late 2008, Early 2009, Early 2010 MacBook, MacBook Pro Unibody Models, Late 2009 MacBook, 2009/2010 Mac Mini, & 2009 iMac : Everything Else