Replacement zipper?

Hi all! I made the stupid mistake of replacing the zipper at a third party tailor. It had completely slipped my mind that Canada Goose has life time warranty. When I sent in the jacket they said they wouldn’t touch the zipper as it’s not original anymore. I can’t blame them. But now I’m wondering if I can buy a zipper at all? Canada Goose does NOT sell parts as I’ve already asked them. Any help would be appreciated!