Catalyst question

Hi again,it never rains it poors with mg repairs,looking around the zed yesterday i noticed yet another problem,not only was the back box between the two silencer a hole forming,the middle section onto the back box was also fubared,but the other end middle to cat didnt look to good either,overall the cat is in good condition apart from the end flange,has anyone repaired an origianl catalyst ? replaced the flange ?

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