Yes the Nyala import was don't the wise way but as far as I know was all done in NZ with no input as far as I am aware from here?.
That’s correct. Wellington Zoo made an initial import of 1.2 from South Africa, followed by 1.0 from Singapore in 2011.
Then in 2016, a bulk import of 5.15 was made by Wellington Zoo from South Africa - with both animals from this import (and others bred at Wellington) transferred to Auckland Zoo and exported to Australia.
With the Bovid IRA incomplete at that time, this was the only way to do it - similar to how Dubbo’s Eastern bongo came via Wellington.