There's a bit on Paulz Trainz (the NSW items have freeware equivalents as well IIRC, some of which are extremely good).
There's a heck of a lot of freeware on the DLS as well, for both Vic and NSW (including some ex-payware items from Uncle Rob, which were released as freeware through the VicTrainz modelers group to the DLS, with permission).
There's also a few of us making yet more freeware (and some payware) as well...
Personally, I've got a few freeware Victorian items in production (along with a NSWGR C36 class that gets worked on when I get some inspiration to do so), plus some VR items that will be payware (depending on how the 36 goes, it may become payware - no idea so far though, too early in that project to tell).
Take a look in the Australian Screenshots thread for some inspiration for searches (most screenshots show either available, or soon to be available, items - being little payware available most screenshots only show freeware :hehe: ).
A few usernames to look under on the DLS:
S301 ( click the link my signature for this one :hehe: )
AD602000
Davido
Natvander
VinnyBarb
Billegulla
'VicTrainz' (do a search for the user ID number 1854)
Lesley
There's also a heap more, but they're the ones that I
know have Vic and NSW locos/rolling stock on the DLS
Zec