Zach,
You could get a NPS membership. Just have to submit proof that you are a published photographer and have a current NPS member sponsor you. I’d be happy to be your sponsor, except I let my NPS membership lapse since all my repairs go through the newspaper I work for.
Check out the Nikon web site for professional services and contact them, they’ll help you out.
John
BTW it sounds like one of the internal screws is loose on your lens, that is normally the cause of the zoom locking like that if it hasn’t been dropped or damaged