If you know someone who works with stainless steel, there's a possible solution. Years ago, we broke a Soling mast in Argentina, and it was impossible to import one, so we had a stainless steel "sleeve" with the shape of the mast made, cut off the broken part and riveted the sleeve over the mast. The boat was still competitive after that, and in any case you don't care about a couple of extra pounds. (Or the mast being a couple of inches shorter.)
Practice makes perfect, so be careful what you practice...