Thank you to Eataust for the following glace bushfruit recipe and source:
1 kg bushfruits, fresh or frozen
Bring bushfruits to the boil in clean cold water and boil for 5mins.
Strain fruit and place in a clean container. Boil the liquid with one cup of sugar and pour over the fruit. Leave overnight.
Strain and repeat the process, adding another cup of sugar to the liquid. Repeat this daily. The more often this is done, the thicker the syrup becomes. You must do this 7 to 10 times at least!
Recipe from "Grow your own bushfoods", Keith and Irene Smith, p46.
The following online stores sell glace quandongs. Not able to find any other glace bushfruits online for now, will update accordingly.