Performance Tyre Fitter in Kent?

[jdwoodbury]

I am looking to get some winter tyres on my 992, I don't want to take the car to a local tyre monkey and the rears are 21" and diamond cut so very concerned about rim damage. Are their good fitters you would test in the area or do I have to stump up for the dealer cost to change (as least I can be certain they will pay up if they damage them)?

JD