I have a simple standard steel garage door with 4 pieces connected to
each by hinges. The top piece is damaged - cracked at the automatic
opener connection causing it to bend a little (like a hammock shape)
when being pulled up and cause extra strain to the up force and causes
it to stop once a while. It's pretty easy to remove by unscrew the
hinges. The only problem is - I COULDN'T find any place online that
sells just a piece of the door. Seems like nobody have just a piece
damaged that garage door manufacturers would bother to sell just a
piece or what??