I have been trying to look for a mid tack door to install on my trailer.  I can't find anything online.  We wanted to add a mid tack but can't find any doors online and don't know where to look...  Could we cut out the door from the side of the trailer take the piece we cut out weather striping around the edge, hinges and a handle and just weld the hinges back to the side?  we want something like this.  Thanks

http://www.doubledtrailers.com/images/prod01_7.jpg