While it sound logical to have Alpine pay for the extra shop hours... I'd say you'd be damn lucky to get even a new fuel rail out of them.

I wouldn't piss them off if I were you by making demands... for now. See if they'll fedex you a new part in exchange of the old (they can always have it machined correctly and resell.) All else fails (worst scenario)... you may just have to suck it up and take it to small claims court.