im also in west yorkshire (leeds) and have a 52 plate focus RS, cant really help on the other thins but i know this place are in leeds http://www.thewheelspecialist.co.uk/
havent heard of the pristine place but sound good going to look em up now =] ( as i also in need of refurb.
maybe if you need a dump valve you could try lark speed also in leeds they stop them all

also wheel place will do it in same day and strip n do tyres etc all for you just leave car with them