British Astute class boats would be a good match for Australia. The question would be if BAE Systems could increase production to deliver the first Australian boat or two along with the British orders. I’m assuming that Australia will insist on building most of them domestically.
I’m sure the Aussies would prefer to build their own subs, but that part of the article about “deteriorating strategic environment” makes me think they may get a few “loaners” at minimum.