512GB (64 x 8GB) DDR2-667 MHz PC2-5300P ECC– Cloud Ninjas
Kingston 2 GB SO-DIMM 667 MHz DDR3 Memory (ASU1333D3S9DR8/2G) for sale online | eBay
4.0GB OWC Memory Upgrade Kit For MacBook Pro and iMac
Amazon.com: OWC 2GB (2 x 1GB) PC5300 DDR2 667MHz SO-DIMMs Memory Compatible with MacBook/MacBook Pro, iMac, and Mac Mini Models (OWC5300DDR2S2GP) : Everything Else