N800 Developer RootFS has these already (at least, the N770 one did if memory serves.)

http://www.maemo.org/downloads/download-rootfs.html

In fact, the developer rootfs is probably a better base for a WM distribution --- it's also much easier to distribute if I read the license right.

Furthermore, those are pure-python libraries, and can be copied from any Python 2.5 installation. Look inside "lib" for the "compiler" directory and the "distutils" directory. Copy them into the appropriate lib directory for Python on the N800, and you should be fine.