how to replace 4 bolt exhaust flange on donut gasket junction on 2008 Mustang GT

What is your question?

2008 Mustang GT supercharged. Has 4 bolt flange connectors that snapped of and are rusted in. Pipe is flared with graphite donut gasket. Catalytic converter is on flared side. It looks like I need to cut off both sides but what to replace with? Not sure if there is clearance to use split flange connector but those seem to be only two bolt.

What makes this problem better or worse?

Supercharged GT

How long has your 2008 Ford Mustang had this problem?

A week.