[CentOS] old package location?

Fri Mar 5 22:30:30 UTC 2010
Joseph L. Casale <jcasale at activenetwerx.com>

>But I've forgotten where the archive of old 
>rpms lives...

You can also go forward:)
http://people.redhat.com/jskala/squid/
I have been using these for a couple years. Given the
source, I would say you have nothing to worry about.
jlc