It is going to be next to impossible, john.
Nobel shotguns were imported from France and from most reports, not the best quality.
I think Nobel was in Mass. and went under in the early 70's.
I think your only option is going to be to saw it off and shape it yourself, just be sure to stay within legal guidelines. I think 18" barrel and 26" overall is the limit but not 100%.
Now therefore take, I pray thee, thy weapons, thy quiver and thy bow, and go out to the field, and take me some venison (Genesis 27:3)