No problem
All depends on a garages experience with certain models of car I would expect and their confidence of being able to do a job. I would rather a garage say to me "I'm not confident of carrying out this work" instead of trying and bodging it completely.
Where are you based? For any of the ST tuner companies I expect this sort of thing to be a breeze.
I am down in the South East. Live in Haywards Heath but work in Brighton.
I did look around at trying to find a decent Independent Ford garage but its always nice to get recommendations from people as its a bit of a minefield finding a decent garage. I know the car is 10 years old now but its not had a hard life and until I moved here I only used it at the weekends so its only just ticked over into 36000 miles!