4GB PC3-8500R (1066Mhz) ECC Registered Server Memory RAM – TechMikeNY
8GB (2 X 4GB) DDR3 1066MHz PC3-8500 240-pin Memory RAM DIMM for Desktop PC by NEMIX RAM at Amazon.com
OWC 4GB PC8500 DDR3 1066MHz SO-DIMM Memory Compatible with Early 2009, Early 2010 MacBook, MacBook Pro Unibody Models, 2009/2010 Mac Mini, and 2009 iMac Models at Amazon.com
CMS 4GB (1X4GB) DDR3 8500 1066MHZ NON ECC DIMM Memory Ram Compatible with Asrock Motherboard 960Gm-Vgs3 Fx, N68-Gs4 Fx - C15 - Walmart.com