These people may be able to help. I've not used them but they seem to have a good reputation locally.
http://www.lepsons.com Good to know Alan , thanks.
I have just had 4 tiptop wheels refurbished at RimTec in Meopham.
Pretty awful premises so I feared the worst , but was pleasantly surprised.
Not cheap as each on needed some welding in order to repair dents, but the finish looks good. About £100 per wheel, refurb only would be £50 to £60.