I just bought some seals from TRF and they were much small than the ones I got from Moss and look like they should work. With the door rattle and because the rubber seal was too large and would not let the door close, I opt to just put in a very short piece about 3 inches long on the bottom center and that let the door close easily and stopped the rattle, but again it did not keep the rain out. It was just a little buffer.
The later tr3s with no wood in the door have a rounded corner at the bottom whereas the early door is a straight right angle 90. On the later rounded doors the rains flows in at that point, so if you put the seal around the rounded corner and vertically up the door you will stop most/some the water.