It's not unprecedented, but it's fairly rare. I do remember that a few years back--well, not a few, maybe ten--there used to be an organization that did a lot of the refugee pre-selection for refugees in Turkey. I believe it was a Catholic organization called Caritas. Usually CIC would enter into agreements with organizations that have a very established track record and a high degree of credibility dealing with refugees.
So yes, that's definitely something that could be done, but I really doubt that they would entertain that for someone like the witness who just offered to go and do that without having a track record. However, that doesn't mean some other organization couldn't do it.