91 club car exhaust flange help questions

I've been rebuilding this club car for a bit now getting close.. I bought a new down pipe and muffler so I pulled the old rusted one off and it took some work to get them out, well one came completely out and the other is stuck in there and can't get it to move. 2 questions one anyone know a good way to get that bolt out of the motor. 2nd where the heck do I buy new ones,went to fastenal again and the lady there was more concerned with her phone and sitting in the chair then helping anyone..

Thanks guys!

Nick

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