You might want to try Gentoo mirrors. Just go into the distfiles directory. Gentoo is not LFS, but it does compile EVERYTHING from source files. And they also use bz2 compression instead of gzip, so the files are even smaller.
http://www.gentoo.org/main/en/mirrors.xml
That page has a list of gentoo mirrors worldwide. My personal favorite is the GaTech mirror, it maxes out my bandwidth.
Anyways, the gentoo mirrors should have EVERY file you could possiblly need to build a linux system.
The files will be in the distfiles folder of any gentoo mirror.
Zak