OWC 4GB PC8500 DDR3 1066MHz SO-DIMM Memory Compatible with Early 2009, Early 2010 MacBook, MacBook Pro Unibody Models, 2009/2010 Mac Mini, and 2009 iMac Models at Amazon.com
Axiom 4GB DDR3-1066 SODIMM for Sony # VGP-MM4GBC4GB (1 x 4GB)1066MHz DDR3-1066/PC3-8500DDR3 SDRAM204-pin SoDIMM VGP-MM4GBC-AX - Corporate Armor
Top Tier PC3-8500 SO DIMM - 4 GB DDR3 1066MHz | Sweetwater