Access to a non-standard port via squid

Hi,

I need to allow access to a web site, where they have chosen
to use port 81 rather than port 80. I know that to allow access
to port 81 I need to add it to the Safe_ports acl in squid.conf,
but is there a way that I can allow access only to port 81 at
the site in question rather than port 81 at all sites?

Thanks

Ray

-- 
RFC-822 : Ray.Hillman@bton.ac.uk
  X.400 : S=hillman; G=ray; O=bton; PRMD=uk.ac; ADMD= ; C=GB
    Tel : +44 1273 600900 Ext. 2644 or +44 1273 642644 (direct)
    Fax : +44 1273 642666
   Http : http://www.bton.ac.uk/
Systems Manager, University of Brighton Computer Centre,
Watts Building, Moulsecoomb, Brighton, East Sussex, UK, BN2 4GJ