Pod I like your enthusiasm But I do not think you full understand the problem .Width of centers is the first essential , then no matter how good at welding you may be the width of the lump has to be correct the depth of the lump and the spacing not to mention stripping off the ribs and fitting a new loop . You might have to try 50 pairs of barrels before you come across one that even comes close . Believe me as one who has tried , in my younger and more foolish days , to find barrels that will fit or can be fitted to another gun even of the same make ,it is not a realistic proposition .