I am not the least bit surprised this song has never been used in any Australian church I have played at. Listen to the clip below and you will see you will need an exceptional gospel choir to pull this one off.
It is a hymn for Eucharist by Leon C. Roberts. The verses are based on John 14:1-4. The music has all those jazz chords you love, Db7#11 anyone. I’ll just have to dream about being this good.
Here is a mystery: This is a GIA copyright, where they have lots of his songs, but the only place I can find the sheet music for sale is at OCP. Probably one of those missalette oddities.
I had a go at a backing:
This is more like it: