ftp://ftp.linux.org.uk/pub/distributions/redhat/enterprise/4/en/  direct

[DIR]os/  direct  18360+ twin directories
[DIR]RHWAS/  direct  159 twin directories
[DIR]RHGFS/  direct  365+ twin directories
[DIR]RHDS3/  direct  172 twin directories
[DIR]RHDS2.1/  direct  39 twin directories
[DIR]RHCS/  direct  376+ twin directories
[DIR]RHAPS2/  direct  57 twin directories