This collection of caches has nothing to do with the Church Micro series in the UK. Given that the Australian 2016 census indicates that No Religion and Jedi Knight are the fastest increasing classifications of the optional religion question "What is the person's religion?" it is not surprising that there is surfeit of empty churches that have been repurposed.
The former St Mary's Catholic Church, Norwood property is now privately owned. No other details are known about the former church.
Using the digits of the year ABCD on the foundation stone that can be seen from the footpath you can determine the location of the geocache.
S34° 55.ABC' E138° 37.5AD'