Arch Memory 4 GB 240-Pin DDR3-1066 PC3-8500 ECC UDIMM Server at Amazon.com
4GB DDR3-1066 SODIMovo#51J0493 51J0494 at Amazon.com
A-Tech 4GB Kit (2 X 2GB) DDR3-1066 (PC3-8500) RAM Memory Upgrade for Apple MacBook Pro 13"/15"/17" Mac Mini Core 2 Duo 2.0/2.26/2.53ghz; MacBook 13in Equivalent to Kta-mb1066k2/4g (Genuine Brand) at Amazon.com