Since the manufacture of the door, more progress has happened. 

I've worked on the bricks on the outside of the door wall...

First off, attach the magnets on the side of the wall. Two magnets were places on one wall, and then pushed into the side of the foam to make the indentation. Then with one magnet only, I pushed that on its own into the wall until it was flush to the wall. Then with hot glue, the magnet was glued in place. This was done with three magnets down the edge of the wall. Once the glue was dry. a matter of seconds. I attached the second magnet to each of the other magnets making sure the polarity was attract. Then pushed the other wall against them where the walls would line up. This is so we can get the correct indentation on the second wall. Once that was done a magnet was used to make the indentation deep enough for the magnet to be flush. Then the fun starts... I placed that magnet back onto the first wall on top of the magnet there, so polarity was correct, then put some hot glue onto the second wall, and pushed them together. This ensures that the magnets have the correct polarity to pull the walls together. This was repeated for all three magnets. Then the wall is joineed as below.