I have some laptop memory at home that isn't much use, as I don't have my lappy any more; let me check and see what I have and I'll post later tonight.
Edit: I have found 2 x 512Mb Adata DDR333 (2.5) sticks of laptop memory - these should take your laptop to 1Gb of RAM. Part numbers marked on the sticks are AD1333512MMS (HYPDB190805Z) and MDOHY4G3H3420B1E5Z. I've put these here so you can check the compatibility, as laptop memory is notoriously finicky.
Are these of any interest to you, at £20 + postage?
@danhans115 - I could be wrong but on most of those models the other slot is on the other side of the board meaning that normally you have to rip the machine apart to get to it. IBM started doing this with the R and T series, Dell with the inspirons... Might be worth checking just in case it is there, i guess a google search for a service manual would confirm but i thought i`d say anyway just in case