The HKS sport is a quiet stock looking exhaust but is only 75mm.
The Tanabe is 80mm, quiet til WOT, but doesn't look stock.
The HKS Super Drager is 85mm is somewhat quiet, but doesn't look stock.
You could get Cooleeze cat back pipes, which are 3", from HPF or SS and get the muffler or your choice and have a muffler shop weld it on for you.