It's nice to see an American like you interested in and mentionimg Aussie ships like the Canberra Class LHD and the Hobart Class Destroyer. I love building model ships, most of which are from the US, but as an Aussie I would die for a proper Canberra Class LHD and Hobart Class in 1/350!
Even though these ships have been out for a few years, I don't believe any Model Kit company has made kits of these yet, (at least not in my preferred scale) unfortunately...
Hopefully it wont take them 10 years to make kits of these ships as that would disappoint me greatly...