I see here
https://www.immigration.govt.nz/abou...-with-industry that there are 'trials' mentioned, as having been extended in 2014, and this is a page dated 2017. Then, this page
http://thevisacentre.com/news/nz-stu...-pilot-update/ mentions that the pilot will run till the end of 2015.
I think you will need to ask INZ if anything is still running, which you could enter NOW, or you could contact one or some of the colleges you have found mentioned. They will know if any arrangement is still in place.