i think the hat makers get their fur from Russia now so no market here but you could try some of the leather shops ? they may be able to put you onto someone let us know how you get on
Akubra source the skins from many countries according to their website. When I was a teenager my uncle took me to a rabbit farm near Narrabri that was breeding giant bunnies for sale to Akubra. They were not ordinary rabbits but a specific breed that grew fast and had the right fur for producing felt. The meat went to a pet food maker, the guts was used for something else, pies I think
Several videos in the link below if you want to know what's involved in making an Akubra.