If you can't find felt wads Down Under or if prohibitively expensive, you could make them yourself. www.ebay.au search for "felt" and "industrial felt". A nitro card might protect them from melting (if non-wool and polyester based)
There are hollow punches available on ebay.au that can cut them out. I've tried felt wads and they sure do lead the barrel which for me is difficult to remove. Gil