Legendary Maleny (SE Qld) "Folk Troubadour", Tommy Leonard, recorded a CD of 18 of Don Henderson's songs in 1997, entitled "A Gentle Breeze".

It's listed on his website, though it's possible however, that it is no longer available; his website looks not to have been updated in some time :
https://www.tommyleonard.com/

Here is Tommy singing Don Henderson's "The Prosecution Song" from over 10 years back at the now defunct "Upfront Club" in Maleny :
https://www.youtube.com/watch?v=gHjheDR-J_4


Cheers, R-J