Volvo Mechanic Recommendations Near Belfast

Last year we bought a secondhand low mileage 2L petrol Volvo V50. It’s been great so far but we have noticed that when the car is started from cold there is sometimes a squeaking sound that goes away after a few minutes. It doesn’t recur if you start the car again later in the day. Google tells me it is could be the alternator belt that needs replacing.

We haven’t had a Volvo before. The Agnew dealership website seems fairly pricey, so does anyone know of any decent mechanics in & around Belfast who work on Volvos & could sort this?