What exactly does the C27 tend to transport around. Is it mail, people, cargo or something else.
My understanding is they get used a lot across the pacific islands, less as a military driver, but more as a humanitarian/disaster relief. I have even heard they get used for surveilance as part of fisheries patrols.
If it is being used as a people movers, then I would have thought civilian cessna or king airs could be contracted or gifted. If its surveilance, then it could be incorporated into triton or P8 circuits.
I'm thinking disaster relief can be done to larger runways and then shipped in.