Hey, if it's broken where a silicon tube can be pushed over it, slip a length of tube over it and see if that holds.

And if it's where it can be brazed, brazing is way stronger than most people think. The brazing won't stand the vibration any better than the metal did (that is unless the metal was flawed to begin with) but.... if you can then slip a length of silicon tube over the weak area where it broke originally....... BTW, aluminum pipe brazes just as easily, you just need to have aluminum brazing rod. You probably already have a propane torch, right.

You can also find brass tubing in sizes that "fit" over the break. I've bent big brass tubing to match the bend and then parted it in half. Took one piece and brazed it over the hole. The result was a covered rip where the patch reinforced a bad weak design. I could have used both halves but didn't need to. I bet the guy is still flying that engine. BTW, I got him to introduce a section of silicon tube just downline, at the next connection, and the new layout looked bulletproof.