Thank you again (this time Eric, Liz and Ray) for some more helpful contacts. I'm still in the dark about how easy/complex it is to re-fret a guitar but I now have a starting point. It's strange that in all my years of playing, I've never had a conversation with anyone about a guitar re-fret?? Do any other guitarist have a re-fret story?
Thanks to all who have given names and advice
Mike.