Praise for County Radiators in Basildon(Essex land).
My radiator blew up a couple of weeks ago. I was understandably upset because this meant I had to drive my Peugeot to work.
Now suzuki want £430 plus VAT for a new radiator for my bike(GSX650F), but helpfully Johns of Romford pointed me to county rads.
Took my radiator down to them to have a look at. Unfortunately I had used some epoxy metal stuff to seal the rad to get me home, otherwise it would have cost me £30 for them to plug the holes with their special resin.
As it was, the radiator was fooked. However the nice men at County Rads said they could build me a new one to exactly the same size/specs as my original, only out of Copper, which would be a few ounces heavier but easier to repair if I ever need to again.
All for 1/3 the price of the OE Suzuki one. 
I’ll take it says I, and now 5 days later it is fixed perfectly to my bike and working like a dream. Ace.