I always wanted to take the spare tire out of there and manage a place UNDER the truck.If you move the evap can out of the way,it should fit.I know i'll get it to fit one day.
As for the life saver tire,i tought i could use the center piece of a regular sporty steel wheel and weld that back to any fair size life saver(with the center removed,of course).Any machine shop could do that.