So, I decided to pickup a piece of 3/4" plywood, a sheet of Fiberglass Reinforced Plastic and some contact cement. Stay away from the waterbased Contact Cement if you can, i understand the volatile organic compounds the original formula possesses that are released into the environment, I also understand the amounts of monies I lost on another project by ruining a glue-up by choosing to use the water based Contact Cement. It simply did not work.
The door was cut to fit my necessary opening and the Fiberglass Reinforced Plastic (FRP) sheet was cut with aviation snips and glued. The aviation snips work well on this stuff by the way, no splintering or splitting of the sheet while cutting.
I will be making fiberglass edging that will be mounted to the exterior of the door's edges. This will serve to seal out the weather hopefully by compressing weatherstrip bulbing to be applied a little later on. I plan on creating an internal jamb with weather stripping as well. It is really difficult to locate the appropriate J-channel on the internet that will fit that is not 'gold'...really overrated for what purpose it serves.
I may end up having to retrofit or replace the door with a better invention but for now this will have to work.
Door has been hung now and these strips have been installed along the outside edges, which will serve as a means to keep out wind and rain.
Door is hung, however not complete, has been insulated on the interior and now awaiting paneling.