I worked in LAD for about 10 years and most of the hulks were old aircraft which could not be fixed, or had been abandoned when the cargo business folded, and yes some were left over from the war.
I looked at some serial numbers on the B727-100 and one was an ex Ansett aircraft but mostly from US assorted airlines. I looked to see if there was any from TAA, but none as I would have worked on it in a previous time.
When I left they were slowly cutting them up for scrap.