I am responding to a posting on the above. I reside in the US, but I have
two sources in Melbourne (I think) where one can purchase the above,
although I have not personally done so.

Bushland Flora
Cleggn Rd.,
Mt. Evelyn,
Ph: 03-9736-4364

Dragonfly Aquatic
RMB-AB 366
Colac, Victoria

Hope this helps.