The Bunnings Workshop community can help with your home improvement projects.
You can buy mushroom growing kits @gore, although it seems Bunnings doesn't currently stock them. This might help - https://www.aussimushroomsupplies.com/ or https://mushroomkit.com.au/products
thank you @Isobel !!
Workshop is a friendly place to learn, get ideas and find inspiration for your home improvement projects