ftp://ftp.cse.buffalo.edu/pub/FreeBSD-Archive/old-releases/ia64/  direct

[DIR]5.1-RELEASE/  direct  88 twin directories
[DIR]5.2-RELEASE/  direct  43 twin directories
[DIR]6.0-RELEASE/  direct  320+ twin directories
[DIR]ISO-IMAGES/  direct  590+ twin directories
[DIR]5.0-RELEASE/  direct  42 twin directories
[DIR]5.2.1-RELEASE/  direct  60 twin directories
[DIR]5.3-RELEASE/  direct  67 twin directories
[DIR]5.4-RELEASE/  direct  80 twin directories