If I have a broken catcher I cut the catcher right across at the front and this removes the loose cracked ends and that stops the catchers cracks from expanding or I just cut the broken corner off.
Some sheet metal riveted on both sides will hold a very damaged catcher together.
I can't say how long a catcher will last with a little of the front section removed but I have given people catchers like this and they have never needed another catcher.
I would just cut the section out and see how it goes if the catcher flexes and starts to crack,use araldite and glue the reinforcements back in or rivet some sheet metal on.
