MacBook Pro 15" Unibody Late 2008 & Early 2009 - iFixit
A-Tech 16GB Kit (2x8GB) RAM for Apple MacBook Pro (Mid 2012), iMac (Late 2012, Early/Late 2013, Late 2014, Mid 2015), Mac Mini (Late 2012) | DDR3 1600MHz PC3-12800 SODIMM 204-Pin Memory Upgrade at Amazon.com
What is max RAM for MacBook Pro Early 2008? | MacRumors Forums
MACBOOK PRO Early 2008 2.4 GHz Core 2 Duo 6gb Ram | eBay