parts-quick 8GB (2 X 4GB) DDR2 Desktop Memory PC2-5300 240 pin 667MHz Non-ECC DIMM RAM at Amazon.com
4GB [2x2GB] DDR2-667 (PC2-5300) RAM Memory Upgrade Kit for The Apple iMac 7,1 (20-inch, 2.0GHz, MA876LL/A) Intel Core 2 Duo (Genuine A-Tech Brand) at Amazon.com
DUOMEIQI 8GB Kit (4X 2GB) DIMM UDIMM PC2-6400U DDR2 800MHz PC2-6400 CL6 1.8v 240 PIN Desktop Memory RAM Module Fit for Intel AMD System Non-ECC Unbuffered at Amazon.com