Hey Matty. Sounds like you do have the NZ retro AI pack, but check the following thread coz one of the downloads does include the metroliner with 4 repaints:
http://nzff.org/forum/viewtopic.php?t=...;hl=retro+metroNo sign of a Bandeirante AI anywhere, but there is a flyable one on flightsim.com (filename: anz_e110.zip) but not sure what it'd be like for AI tho coz its quite a reasonable model. I have a Saab AI model on my machine and a flyable Metroliner which should also be ok as AI I'd say on a decent rig.
Saab340 by FSPainter/FSP (repaints by Che Ridland)
Air New Zealand Link
Air New Zealand Link Old Livery
Air Nelson
Metroliner III model by Jon Murchinson
(base file: met3pass.zip at flightsim.com)
Origin Pacific
Air New Zealand link
There's a Mike Stone Metroliner also with a recent air ambulance repaint (filename m3_nzct.zip) but not sure if anyone painted those in Air Nelson/Eagle/Link etc.
I've also got some DJC AI (Craig Ritchie) Metroliners in my FS9 rig but none of those are kiwi repaints.
See if you can source those files based on the above info, if not, let me know you're email and I can send em thru to you. Are you planning to share your AI schedules when you get them up and running?