The role of an `original´ item is to document its historical connection. This can hardly be done accurately if it is not in the condition it was at the time. You could not accurately portray a uniformed, WWI active soldier in a faded, moth-eaten uniform, wearing disintegrated and tattered, leather equipment. As there are still some remaining leather craftsmen here in Germany (and in the former German provinces in Poland), making Luger holsters on exactly the same lasts and using mil. spec. leather and twine, I can see no purpose in reparing an old Luger holster, unless it is intended for use.