well i recently got mines back to stock but its not exactly an integra factory muffler but it is still stock and quiet and sounds nice. I got at Lou's custom exhaust on Mass ave., boston. I paid $80 which includes installation. They do it quick too.
I have one you can have...but the some of the baffles welds inside the muffler have been broken loose and it makes a vibrating noise at about 3500rpm...after 2yrs of driving w/ it i couldnt stand it any longer and just grabbed another