I'm not sure about prices, i got a mk2 wing sprayed and fitted for 150 quid (i supplied the wing) a few years back. They were by far the cheapest, and they done a very very good job of it.
My dad has since taken his Audi in for a polish as the red paint had faded, they done a top job on that too.
I would go down there and have a chat with them, ask about the alloys as well.
Also they are the coachworks that Wheelbase use, and Fiat , or at least they were when i last went in there.