The key thing in that webpage is a link to the excellent paper "STRUGGLING FOR A SOLUTION: THE RAN AND THE ACQUISITION OF A SURFACE TO AIR MISSILE CAPABILITY" by Peter Jones and James Goldrick.
http://www.navy.gov.au/w/images/Working_Paper_2.pdf
And in particular:
“The discussions with the British in particular were complex and lengthy. Some Australian illusions were dispelled, notably the idea that a smaller ship than the COUNTY class could be produced to carry the SEA SLUG missile. Furthermore, the Admiralty did not have the capacity to redesign the COUNTY to take the TARTAR missile—an option which would probably have been the RAN’s initial preference, given the other logistic and training compatibilities which remaining with British designs would have sustained. Although Vickers, the commercial ship builders, suggested informally to Burrell that they could manage the redesign of the COUNTY to take TARTAR, the CNS was not willing to take up this offer.”
The interest was in the Adams class because they were 15% cheaper than a County, available with excellent financing and very quickly from US build. Which was all good for the Navy in the short term…
Finally had the chance to read the pdf, thanks for posting the link Abe.
The conversion of the cruiser HMAS Hobart was interesting, they would have been looking at Sea Slug but Tartar would have been much easier and more effective to fit, either Mk11 or Mk13 launcher(s) replacing B, C, or B and C turrets with two, three or four directors and a comprehensive radar update, Type 984 may even have fit. Makes sense that this option was never seriously considered, she was a single ship, she was old and had seen hard war service , with her bow being blown off by a torpedo, but then again being a prewar build she may well have been fit for service into the 70s or even the 80s its just a question of whether it would have been worth it.
If however the RAN had been permitted to take up the UKs offer of a CVL, two Tiger Class cruisers (think Superb and Swiftsure rather than Tiger, Lion and Blake) and six destroyers during the war; cruiser conversions would have been an entirely different matter. Hobart could have been the prototype with the two Tigers following with more mature fits, sticking with Tartar as it was proven suitable for conversions and had less impact on the platforms than Terrier, Sea Slug or Talos. These three ships would have filled the RANs air defence requirement while also covering the anti surface role with their remaining 6" guns, maybe look at the Mk 26 as per the RN Tigers for the upgrade to the later two ships. They would have brought the RAN into the missile age by the mid 60s, kept the ship yards busy and filled the gap pending the design, build and delivery of the RAN Counties as replacements for the Darings during the late 60's aearly 70's.