The Polished Wheel Company in Wadebridge.
Had my Sharktooth alloys refurbed by them and they have come up top notch.
01208 895615. www.thepolishedwheelcompany.com. It's £240 for 4 15" alloys and goes up each alloy size as it were.
They are the only ones in the south west i know of. Hope this helps.