What awful news! So sorry to hear
Perhaps she already had the faeces stuck around her vent and you hadn't noticed. It's usually a sign of illness. If I had seen this earlier I would have told you to get her in with a vet for a necropsy but as it's been 2 days I'm assuming that she's been buried. It would help you get to the bottom of it and then you would know whether or not it would be wise to get a new bird in straight away. If you are planning on getting a new bird, clean everything
using a very strong disinfectant like F10. It can kill any bugs and diseases. As for when you get the bird it would be worth taking them for a full blood work up if you can so you know if there's any hidden nasties
As far as I'm aware, you cannot import or export birds in and out of Australia. I may be wrong, but I'm sure it had something to do with PBFD? I'm going to google it now...
Okay I can't find anything on it. Hopefully Kate or another Aussie member can chime in and help me out here
Other species similar to the Princess of Wales parrot are the superb parrot, the crimson winged parrot, the Australian king parrot and a few others. You can also get rosellas (various species) but I personally don't think they make good companion parrots. They're far more suited to being in an aviary. You've also got smaller species like the grass parrots and Bourke's (Bourke's parrot, scarlet chested parrot, turquoisine parrot, red rumped parrot etc.) but again, many of them do better in an aviary. In fact, I find most large Aussie parakeets do! And the smaller guys seem quite flighty too which is why I think they'd do better in an aviary
The best Australian parrot, IMO, is going to be the cockatiel. They have very expressive crests, they come in awesome mutations, they're mostly quiet (more so the females), they're very inquisitive, they're naturally friendly, they can be very cuddly, the males usually pick up whistling really well, they're inexpensive to buy and very easy to keep happy. I just love them. I think they make the best companion parrot out there