So a heavy exhaust leak has caught up with me, and a few misfires later, I'm looking to get it replaced. My fiance's family business has a mechanic who agreed to doing the work for me, but is having trouble sourcing the exhaust parts. Not sure the exact section he's looking for, but where do you go typically?

Honestly, it depends on what part he is looking for.
I have been able to borrow parts from other cars for a fraction of the prices of the "correct" parts.

However, here is a website I have been using extensively of late. It should also help you visualize what you need.
1. https://www.infinitipartsdeal.com/parts ... m=140_C002
2. https://www.infinitipartsdeal.com/parts ... ffler.html

I don't bet much, but today I'll put my money on the issue being a cracked manifold, more likely the left side? Humor me, let me know what he finds to be the issue