There is a Dorchester in the Merredin Military Museum fully restored . It is owned privately but is displayed there . The story goes that there were 7 Dorchesters in WA in the ww2 , Four of them were cut up for grader blades ,one went back to England , one that nobody know what happen to it and the one in Merredin , The merredin one was found in a back yard in Bayswater and was being used as a garden shed , all it was , was a shell , no running gear .the back yard was very close to a site used a scrape metal yard for many years and that may have been were the lost one may have gone ,
It changed hands a few times before it tuned up in Merredin , A chap name Mal spent five year off an on restoring it . Mal has since past away and his Wife has left it on display ,
It was stationed in Northan , Nungarran & Merredin at differant times . In 1945 a VULTEE VENGEANCE crash (
http://www.ozatwar.com/ozcrashes/wa88.htm ) and the same Dorchester that is in Merredin was used as a command vechicle for the search for the crew an plane,
If im able to help you with anything else just ask .