I have I believe built the first and only S gauge layouts based on NSWGR practice. I am aware that Dr Steve Suggit had some standard gauge models of NSW locos along with a variety of other prototypes as an adjunct to his Sn3.5 QR layout. If my memory serves me correct the Mt Corrimal Railway exhibition layout was in S scale representing the 2 foot gauge private coal line in the Illawarra. The only other NSW S gauge models I am aware of are the dummy steam locos built by Leo Fitzsummons: one of Leo's models is pictured above.
I have heard a rumour of an S scale suburban tram layout on the NSW exhibition circuit but have never seen it. Information received on its existence would be greatly appreciated.