The 30" Flowmaster would fit your need. They are a very good starting point for sidepipe applications (quiet, but still noticeable as a V8 Cobra), i use them too. They are SS, so you can polish them to mirror finish if you like to do so.
From my personal experience, it is much easier to build new sidepipes with the Flowmaster than messing around with the current ones
PS: the cone inserts are crab and useless