Put a call into the Luxury sales team at Heritage Bristol. They mentioned to me when I was going through the sales process that it's difficult to find people to do it because of the finish, but they had tracked down a company (somewhere near Birmingham I think) that will do it.
It depends on how badly damaged they are as to what needs to be done. I damaged my Phaeton wheels and I repaired those, but it is a time consuming job. Getting the correct colour is a major issue I managed to mix a collection of paints to get near the right colour. I think the manufacturer of the right paint is Wurth.
I think when replacing the tyres it may worth considering getting a tyre with a 'chine' on the tyre. This is a raised band round the tyre which holds the wheel away from the kerb.