There's a growing capacity problem at FRAP, which is about to be made worse by the impending launch of the Continental. Fusion demand is down slightly, but that's misleading because the FRAP built Fusions are in high demand according to some of my dealer friends (perhaps Dean or ice-capades can share their experiences), and with the impending launch of the 2017 Fusion MCD, it's unlikely that we will have less Fusions in the build mix.
Look at the sales numbers for November. Even though monthly sales are down, the amount of Mustangs sold in North America has been unreal, compounded by overwhelming demand overseas. Unless there's a third shift added soon, RHD markets are going to have to deal with such small allocations.