I was nursing that idea myself See-Three, but I have found a solution.
An ex-local in here put me on to a workshop that employs a guy who rode trials in the same club I used to be in, and I took it out to show him. He has a metal disintegrator/spark eroder but said it is slow, old hat now, and expensive, then went on to say he can fix it fairly cheaply with his milling machine. So I get it back next week - yay!
I'd like to thank you all for your time and suggestions, it is much appreciated. This place contains the best folks around for sure.