Here are some shots of Sadleirs Logistics Spotswood Depot. There is a PN shunt move from Dynon, which services this depot. A very modelable ultra modern operation.
Of course Auscision's RLSY would suit, although they don't produce the current livery, to the ones shown here.
Anyway, there are great weathering examples of RLSYs, still in SRA blue and red, covered with graffiti. The ones in green however, really seem to fade fairly quickly.