1GB [1x1GB] Memory RAM Upgrade for the Lenovo ThinkPad R61i, T61, T61p Laptops | eBay
Crucial 8GB 2X4GB PC2-6400 DDR2 800Mhz Memory For IBM T61 T61p R61i R61 X61 X61S | eBay
OFFTEK 256MB Replacement Memory RAM Upgrade for IBM-Lenovo ThinkPad R61i (7742-xxx) (DDR2-5300) Laptop Memory at Amazon.com
2GB DDR2-667 (PC2-5300) RAM Memory Upgrade for The IBM ThinkPad R60 Series R61i (7650CDU) (Genuine A-Tech Brand) at Amazon.com
How to upgrade RAM memory in Lenovo ThinkPad R61 laptop - YouTube
2GB Memory RAM Upgrade for the Lenovo Thinkpad R61 Series, T60 Series, T61 Series, X60 Series and X61 Series Laptops (DDR2-667, PC2-5300, SODIMM) at Amazon.com