Komputerbay 8GB (2X 4GB) DDR3 SODIMM (204 pin) Made with Hynix semiconductors 1066Mhz PC3 8500 for Apple 8 GB with SODIMM Heatsink for Extra Cooling at Amazon.com
Amazon.com: OWC 64GB (8 x 8GB) PC8500 DDR3 ECC 1066Mhz DIMMs Memory Compatible with 8 Core or Better Mac Pro Early 2009 & Late 2010 'Nehalem' & 'Westmere' Systems & Early 2009
OWC 24GB (3 x 8GB) PC8500 DDR3 ECC 1066MHz DIMMs Memory Compatible with Mac Pro Early 2009 & Late 2010 'Nehalem' & 'Westmere' Systems and Early 2009 Xserve (OWC85MP3W8M24K) at Amazon.com