if it is aluminum, it can be heli-arc welded back together. I would add a reinforcement plate to it also. What caused it to break?
I would price getting it welded versus buying a new one
I should mention that the part is 2"x2", I'm not sure I could find a shop willing to even mess with something that small.
is that out of Frankford's Stainless System?
Call Frankfort Arsenal, maybe they will have the part and do a goodwill warranty.