TECMIYO DDR2 PC2-6400 DDR2 800 4GB Kit (2x2GB) Non ECC Unbuffered 1.8V CL6 200-Pin Sodimm Laptop Memory Module at Amazon.com
OCZ Reaper PC2-8500 1066 MHz (2 x 2GB) 4GB DDR2 Memory RAM OCZ2RPR10664GK at Amazon.com
OWC 8 GB (2 X 4GB) ram PC8500 DDR3 1066MHz sodimm 204-pin Memory Upgrade Kit, (OWC8566DDR3S8GP), Compatible with MacBook Pro, MacBook, Mac Mini and iMac at Amazon.com
Crucial 4GB Single DDR3 1066 MT/s (PC3-8500) CL7 SODIMM 204-Pin Notebook Memory Module CT51264BC1067 at Amazon.com
DDR2 Ram, 4GB 800MHz PC2-6400 DDR2 RAM 240-Pin 1.8V, DDR2 Memory Module for Desktop Computer Memory Module at Amazon.com
Kingston Technology 4 GB Memory for Select Apple Imac's and Macbooks Single (Not a kit) 1066 MHz (PC3 8500) 204-Pin DDR3 SO-DIMM KTA- MB1066/4G at Amazon.com