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
16GB PC Memory RAM Desktop Computer Memory Module PC DDR3 800MHz 1600MHZ 4GB 8GB 16GB Expanded Memory Module PC Accessory - Walmart.com
4GB DDR3 Ram Memory+Cooling Vest PC3-12800 1.5V 1600Mhz 240 Pin Desktop Memory DIMM for Desktop AMD Motherboard - Walmart.com
4GB DDR3-1333 DIMM | Microseconds
Timetec 4GB DDR3-1333 UDIMM - Timetecinc.com - Memory of Lifetime and Easy Upgrades