Elephant accomodation- so would I but I fear its unlikely given the enormous expense involved.
GI Rhinos- they were offered some from India some years ago but for some reason they declined. A pity as the flat land at the bottom of the Park would make ideal enclosures for them and they would no doubt have succeeded with them- as with Black Rhino.
Orangutans- they have never had them as old Aspinall was not fond of them. That's not to say they couldn't do well with them nowadays but it seems a bit unlikely unless they were offered some which is how they seem to aquire some of their new species nowadays.
why was John Aspinall not fond of Orangutangs ? seems quite strange as he was fond of gorrillas and chimpanzees ,he seemed to think that the gorrillas were the image of the "noble savage i read he wasnt as fond of chimpanzees because "they were more given to their emotions and less dignified" , he certainly was quite an eccentric man although noble in his efforts in conservation