Friedrich Wilhelm Ulrich Rust South Australia

Hello we are looking for the family of Friedrich Wilhelm Ulrich Rust who married Maria Elizabeth Heinrich they had 5 children around the Trial Hill, Burra and Kooringa area, but then moved to Coolgardie and Albany in Western Australia. We believe FWU Rust emigrated from Germany, but cant find out any record of it, we also cant find any marriage for him and Maria Heinrich. we are hoping someone has a link.

kind regards
Kevin