Luke, I don't know the answer to your #1. Someone else may be able to help you.
#2. Are you referring to <kuid:-25:209> 4m standard seaport ? If so, this is a very old Auran asset,... build 1.3 version and it hasn't been updated as yet. If you are looking for a ferry or boat station/dock check out vulcan's assets on your Content Manager.
#3. This is a very BIG ask. There are many Australian locomotive and rolling-stock creators out there. However if I could suggest, select one or two models that you like and require updating, then send a 'Personal Message' to the builder/s and ask them nicely. If they have it on their list of things to do, then you could be lucky. Unless you are a modeler yourself, then you may need some patience.
Cheers,
Roy