Exhaust leak (can a muffler shop do this?)

[stateofidleness]

Hey all,
I've had a "card-in-the-spokes" sound from my exhaust for some time now and want to try to get it fixed before Boxtoberfest

Is this something that a Porsche (dealer or good indy) has to do, or can a hole-in-the-wall muffler shop do a smoke test as well? I have a feeling that my indy might charge me a lot to hook his smoke machine to it, so just curious if this is something a smaller shop that specializes in exhaust/mufflers can do.

I have a feeling it's coming from around the manifold somewhere... how much of a pain in the ass will that be to fix? (what is the fix for a manifold leak?)