OFFTEK 4GB Replacement Memory RAM Upgrade for Gigabyte MSH61DI (DDR3-8500) Motherboard Memory at Amazon.com
8GB (1x8GB) DDR3-1066MHZ PC3-8500 2Rx8 SODIMM Laptop Memory by NEMIX RAM 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 DDR3/DDR3L 1066 MT/s (PC3-8500) SODIMM 204-Pin Memory For Mac - CT4G3S1067M at Amazon.com
URAM 4GB DDR3 SDRAM PC3-8500 1.5V SODIMM Samsung IC RAM(Laptop Memory) at Amazon.com