In this whole story, what boggles my mind is that Cervelo would not keep a stock of at least a couple of forks around? Even if the frame has been discontinued, surely, you can keep a few spare forks and (in case it is proprietary) seatposts in stock for exactly this reason.
Perhaps what others have posited is true, and the fork is just the same as the other model C2 fork. Or interchangeable at least.
I will say as others have said: It sounds like Cervelo thinks this is damage due to misuse that would not be covered under warranty. I understand you'd be upset if it wasn't and treat your stuff carefully. But if I were you, take the free replacement fork and consider yourself fortunate you don't have to scrap the whole frame (or pay for a costly fork repair out of pocket). Lucky they have a compatible fork at least. Hopefully your bike is a neutral color and they can just give you a black or white fork or something. Good luck!