I found a leak in my exhaust and the garage I take it into said they are unable to find the pipe part that I'd need to replace. One of the mechanics there mentioned that years ago he'd seen people replace their exhaust system with performance parts cheaper than with oem systems and that could be an option.

At this point I'm not too sure what the best way to go is and so looking for some advice. Also anywhere where I might be able to get what I need, stock or performance parts would be really helpful. Attached is a diagram showing which part has the leak

Diagram is here https://imgur.com/a/9Lfgcdt

 

you know if you cant fix this yourself
any muffler shop can

they will cut out the leaky section of exhaust and weld in a new peace of piping

nothing has to to ordered