Be lucky we have what is there. The FM-2 model is really old and very limited. It's hard to skin. Only a few skinners would even bother tackling it, but since it's in line to be updated sooner than most the chances are that the work will be lost and need to be done again.
In short, folks are waiting for the upgrade and then will work on more skins. I would caution too much hope, since the handful of skins we currently have cover just about all possible paint schemes the wildcats used in ww2. There wasn't much variety on this plane.