Here is a link to the ATA laptop drives that Newegg is selling.
http://tinyurl.com/8cwmsq
While most 2.5" ATA / IDE drives should work in your laptop, you do need to check 3 things:
Drive thickness: Make sure the drive is not too thick for your drive bay.
Drive size: Make sure that the BIOS for the laptop does not have a maximum drive capacity that would make some of the drive unavailable.
Both of the above can be verified at the laptop manufactures support page.
You also need to think about your operating system and hard drive size limits. If your restore disk is for the initial release of Windows XP, you may need to slip-stream at least service pack 1 to be able to use a drive larger than 137 GB.
Speaking of Windows, do you have a rare laptop where you have actual restore disks?
For most systems, the restore files are on a hidden partition of the hard drive.
If you do not have restore disks, you may be able to order them from the manufacture.
Chas