It's in the exact same download directory as the iso's are located.
http://grafpup.org/iso/releases/graf...d-2.00.tar.bz2
There is an extra README that you should check out, because I made a few changes to the process. Nothing major, but a few enhancements really that help when building for multiple targets (Opera v. Seamonkey). But if you've ever used unleashed to build Puppy it should all be straightforward.
Nathan