This search came to me by a circuitous route which included contacts at the Army and Air Force History units and the Directorate of Honours and Awards.
The original request for assistance came from Queensland Police Sergeant David H who had recovered two WWII medals awarded to NX127488 Allan Owen Brown. What I was able to provide David was that Allen died in 1984, his wife Mary died in 2004. They had one son whose name is William. In the late 1970s they were living in Bexley NSW. I wondered if William had moved to QLD so I provided David with his full name. This turned out to be the case and David found William on his own database. AS it turned out the medals were stolen a year or so ago.
Thanks to Tim at AHU and Jo at Honours and Awards for the referral.
The returned medal tally is now 2607.