Argos are in Bristol but getting a fuller susser painted by them will be around double the figute quoted above. I think they stove enamel rather than powdercoat.
Search Yell.com or similar for industrial powder coaters in your area, you should be able to get it done for around £50.
"Well I think I may cancel my order for RC31s.....at least being in Britain you can send the forks back when they get problems (unbonding RC36 dropouts, failed bushes RC36) Pace used to sell on being british made, thats now gone!"
Kenny 
