The Song book of the Salvation Army Hymn Tune Accompaniment CD set is a widely used resource among many corps in rural and remote settings, and is now available to accompany congregational singing using pieces in the 2015 tune book. Information on this 12 CD set including both metrical and alphabetical listings can be found on the US Central Trade site. The set is available for approximately A$200 + shipping.
If you already have the original version based on the 1987 tune book, an update is available which includes a new index and 30 new tracks.
This is also available for purchase through US Central Trade for approximately A$33 + shipping.