A-Tech 8GB (2 x 4GB) RAM for Lenovo THINKPAD T61P | DDR2 667MHz SODIMM PC2-5300 200-Pin Non-ECC Memory Upgrade Kit at Amazon.com
Upgrading RAM in the ThinkPad R61 - 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
Lenovo ThinkPad R61 15" Laptop- 1.8 GHz Intel Core 2 Duo, 4GB RAM, Hard Drive or Solid State Drive, Win 7 PRO
OFFTEK 256MB Replacement Memory RAM Upgrade for IBM-Lenovo ThinkPad R61 (7744-xxx) (DDR2-5300) Laptop Memory at Amazon.com
LENOVO THINKPAD R61 Intel Core 2 Duo 2.00GHz 3GB RAM 80GB HDD Bluetooth 1440x900 | eBay
LENOVO THINKPAD R61 Intel Core 2 Duo 3GB RAM 160GB HDD WIFI LINUX MINT | eBay