I don't know how it held up but several years ago I brazed some broken wire supports like those. I pounded some U shaped troughs out of sheet metal (set them in a vise and beat them into the slot using a steel rod) and bent them around the supports to match the shape and then with an oxy-acetylene rig just fluxed and brazed the whole thing...figuring nobody will see them so it didn't matter how ugly it looked. They felt stiffer but last I knew they hadn't broken. The problem is where they break is a spring point and you aren't going to be able to replicate that...or at least I couldn't figure out how. The hotter you get it, the more you'll change the spring nature of it.

Pretty common for those to break. Others may have alternative methods. Mine is just one. Welding probably would work fine. I just happened to only have an O-A rig at that point and used it.

~ Jon
1952 1/2 ton with 1959 235 | T5 with 3.07 rear end