im going to pop down to a local place that i know does wheel refurbing on saturday and ask, it wont do any harm.
emailed rota and asked them for a price for a single sub zero alloy, it cost me £220 two years ago for all four with brand new tyres more or less and looking at the price of four on rarerims.com its not going to cost me far off that for one i recon.
think im going to be keeping a look out for some 172 alloys on here when i have cash, cambelt and water pump on thursday