Depending on what kind of fit the shop does. How much do you want to spend?
I would search locally for a shop that does the Retul fit. You get a few options, the basic one is a 2d fit which is the same kind of thing most places do, their next level up is the 3d fit, takes about 2.5 hours (costs a bit more, but fit is done with computer help and it gives the fitter more scope to get your fit correct. This is what I did).
Just spoke to the LBS and they do a base fit for £60,will speak to them tomorrow as I'm going in to try some shoes on.