why in the name of heaven would you want to compile this thing?
To get the first version, well, go download it from
www.kernel.org, HOWEVER this is likely to be VERY HARD to compile, as the glibc version has changed a lot since 15 ( ? ) years...
If you want to take a look at this old thing, it would be easier to download some very old version of linux. You could also use LFS I guess. Or you could use some chrooted environnement to compile it but I doubt you will be able to boot from it then.
In any case it is _very_ doubtful that Linux 1.X will run on a RH 9.0 version unless MAJOR tweak, you will need to heavily downgrade most library version, that will break most of the recent stuff...