2GB RAM Memory for Lenovo G550 3000 Black Diamond Memory Module DDR3 SO-DIMM 204pin PC3-8500 1066MHz Upgrade System Specific Memory - Newegg.ca
NeweggBusiness - Lenovo Laptop Intel Core 2 Duo T6600 (2.20GHz) 3GB Memory 320GB HDD Intel GMA 4500MHD 15.6" Windows XP Professional preinstalled with Windows 7 Professional Upgrade Option G550(2958-A4U)
NOKOTION KIWA7 LA-5082P For Lenovo G550 Motherboard With Heatsink+4GB RAM +Power Button Switch Board+CPU Fit for G555 LA-5972P - AliExpress