In my mobile home in the bathroom up in the attic the insulation has fallen off the inside of the roof. It is a aluminum roof. Is there a insulation spray I can spray on the inside of roof, then fill with pink insulation. The roof is curved. The mobile is approximately 40 years old.

Spray insulation can be applied but cost is a big factor. You can buy the tanks and gun but it comes in a volume that would insulate your entire home and the rest would be wasted. You can hire a contractor to do the work but it will not be cheap even though it is small. I would simply fill the space with Owens batt insulation