The Australian government could try the Chinese panda lease approach, which would allow them to retain ownership over the animals. To avoid adverse publicity it would make more sense for any exported platypuses to have been captive-bred, and as mentioned above there aren't going to be any going spare for some time.
I don't think they would be as big a drawer as pandas but I think there would be a lot of interest from the general public.
I don't think they would be as big a drawer as pandas but I think there would be a lot of interest from the general public.