Downgrading squid3

[Gaurav Arora]

Hi,

First time posting to this list so please go easy on me. :)

I am trying to downgrade squid3 to version 3.1.6 to address an issue 
we're having. I have downgraded subversion in the past and have done so 
using a checkout of the portfile at a specific revision from the 
macports svn. However I am unable to find the repo for squid3. Could 
someone please point me to it? Also, is there an easy way to figure out 
which revision uses 3.1.6 version of squid?

Thanks,
Gaurav