That's why I always get a little irritated when people want sumatran rhinos. And imagine them breeding like crazy in PZ. Including those animals would feel to me like making fun of their actual situation IRL.There are so few of them that all the wild kakapo have names. If they're ever kept in captivity, which is extremely unlikely, they will never be exported outside of New Zealand either. They are not tourist attractions; you won't get to see them in real life unless you have good reason.
And with the Kakapo especially, I can't see why a Kea shouldn't be a better representation anyway. But then again, both are birds, so what do I know.