Can't tell you if it'll conform to the shape of the rear of the Norge saddle. I can tell you that the cowl on my 1200S saddle has two tabs that attach it to the underside of the saddle, and is held in place via two screws. I doubt that the Norge saddle has the threaded pieces to receive the screws to hold the cowl to it. Possibly, if the cowl would conform to the shape of the saddle, it might be possible to insert/rivit some sort of threaded pieces into the plastic of the seat pan. Don't know .... just speculating.
OTOH, I would think that a 1200 Sport saddle complete with cowl would 'probably' replace your Norge saddle. I purchased a Corbin for my 1200S that was marked 'Norge' and it is 100 percent swappable with the stock Sport saddle. Unfortunately, the Sport cowl won't fit the shape of the Corbin. So, if I want that lovely cowl, I ride with the stock saddle.
Other problem ..... finding someone who wants to sell their stock saddle and cowl.
Bob+