If the car is insured with Hagerty make sure you file a claim and make a police report. That way they are on the shitlist if anyone brings their car there for a covered repair. They did not lose that part, they stole it. I am always amazed how they lose those, or the windshield chrome, back window trim, park lamp frames, the hard to find stuff. Bodyshops are where superbirds go to die, always telling you how much the car is worth, tear it apart then not work on it, do **** work, then blame the owner. I would get even somehow, I guarantee that, they are pissed at you, that is par for the course, fk them.