Off the shelf KC-130J - complete with HARVEST HAWK kit - would be nice. It can also be used as a helicopter refueling point on the ground. Handy for SF helicopters perhaps.
KC-130J Tanker · Lockheed Martin
https://www.youtube.com/watch?v=ERzT8KoVY7k
https://www.youtube.com/watch?v=hIodcKSIARU