Just seen them, of steel, do that fatigue with use crack before..

But I will agree: a span across the break , I'd suggest a couple pieces of flat bar long enough to extend across the break

sandwiching it beween them to take the load.. would be an adequate Kludge

aluminum flat bar .75"x.125" thick, a hand drill would make the hole.

hot-rolled steel you may wish you had a drill press .. getting a new bracket would be easier.