Thanks Phoenix, I hope they are a very long lived species if thats the case, As another member pointed out yesterday why cant we stick with the group of Dusky Langers we now have at Adelaide zoo at least they are breeding and just build on this group
Yes Mark, that would seem like a more realistic option to me.
1) I can argue with anyone who claims cannot import as can not and will not are rather infamous intertwinned bros ... so to speak (LOL).

This only infers there is no political will to do so and sadly most Australian exotic species programmes will go down the drain if this all-pervasive political correctness/ rationale cum philosophy continues. It is just not in the interest of running any exotic species programme.
2) In Thailand/Burma/Malaysia the wildlife trade remains open to dusky langurs and quite a few confiscees might end up in zoos. So, a source population would not be an issue and it would extend the in situ arm of ARAZPA/ZAA, the region or whatever ....
Macaques and primate disease.
1) Whereas herpes A/B are indeed major zoonotic diseases with intraspecies hopping and a major health concern for humans, the very risk of humans contracting it is rather low. If not, I would challenge anyone to come up with statistics and that Herpes A/B show up big time in relation to common diseases like malaria, TB, polio, smallpox. Where are those scientific and cited papers?
2) If you are SO worried about a neglible animal disease risk then any primate is NO GO as most prosimians have had positive exposure to HIV, herpes et cetera et cetera.
I personally view this whole zoonotic/vet debate beyond the pale and not based upon diligent science, it is pure emotion.
K.B.