how "south" are you in Jersey? Im going to Kooldino's tomorrow (who is in South Jersey, Absecon....10 minutes away from Atlantic City) and Ill ask him if he knows any exhaust shops around there.
personally, for custom exhaust work, i highly recommend mufflex (and no they did not pay me to say this ).
it's not too far from you, drive up i295 to exit 63(i think), route 33, mufflex is right there.
call first and get a quote. i sourced out my muffler before i went down there. they provided me with the hi-flow cat and resonator, and did all the labor for a reasonable price... i got 2.5" 304 stainless from the flex pipe back.
my car was just up there the week before the accident.
anthony up there is really good, call and ask for him..