buy a new one (the very expensive and IMHO not worthwhile option).
Buy a used one but run the risk of getting one in less than mint condition
Go to an alloy repair place. Usually will cost around £40 - £60. This is what I would do. Kerbed an alloy on our
mk2 leon when it was 2 hours old. New tyres, forsty conditions, slid going round a bend at about 10 pmh - just glided into the kerb - sick as a parrot. Got it repaired at local place (decent job for £40). Dealer wanted £390 for a new wheel
Or leave it. Depends how much it really bothers you.
cmc