Are there any good wheel balancing garages in the Glasgow/Paisley area.

I got 2 new Run Flats fitted last week and the garage who will remain nameless has had 2 attempts to balance the wheels and have so far not succeeded... I am getting the steering wheel shakes between 50 and 60 MPH

I am not putting it back in to this Garage but any recommendations of any decent garages in the Glasgow/Paisley area who could balance my wheels properly would be much appreciated