Ryerson Index - death notices (just google). You could try and obtain a copy of notices.
STEINBERGS Alfons Death notice 18JAN1991 Age: 86 late of Lakemba Sydney Morning Herald 22JAN1991
STEINBERGS Angela Death notice 07APR1995 Age: 86 late of Lakemba Sydney Morning Herald 08APR1995
STEINBERGS Anna Death notice 30NOV1980 at Cabramatta, late of South Strathfield Sydney Morning Herald 02DEC1980
If you go to the Australian National Archives website - you will find indexed but not yet digitised documents for Alfons Steinbergs (need to spell his name Alfons not Alphons)It appears he may arrived in Australia from about 1948 to 1950. You can request a copy for a fee.