Oat flour and coconut flour are available in health food shops but some supermarkets have them. Also some nut vendors.
You can make your own oat flour by whizzing rolled or quick oats in a food processor until fine like a flour so that's easy.
Freeze dried fruits are in health food shops or specialty shops. You can substitute dried fruits, just don't try to whizz them to a powder.
What are you trying to make? the strawberry and banana bars? Dried strawberries are OK to use. You can sub banana chips for the FD banana.
Check Woolies in the fruit and nut section.
I don't buy much food at Coles and Woolies except milk, yoghurt and cleaning products lol