On the flip side I'd tell him to get knotted as you'll be frowned at for not declaring the incident sooner. You got quote, he got pissy do it through insurance. Does teh car come up on AskMID as insured? If it does get the claim started and fuck him off. Worst case is he doesn't have business cover but his insurer are obliged to honour a claim to a third party (you) so it'll not be a problem to you. If he has no insurance it might be a different ball game.

They won't CAT-D the car for such minimal damage. I recently had a grands damage repaired on my A4 and there's no markers against it at all that I'm aware of on it and that's worth a fuck site less than your motor