I've just had a price of £40 per wheel from National alloys in Widnes, Cheshire. Never used them myself but did use Proclean many years ago and they did a smashing job. They will do them in a day my appointment but there is a couple of weeks wait as they are incredibly busy which I always find to be a good indicator of a companys work. Will be booking in my IS in when I get payed.
http://www.nationalalloys.co.uk/