New Tailpipe Advice

I recently bought a 2012 WRX Limited/Premium (can't tell which, maybe both?) with the SPT (Subaru Performance Tuning) package.

One of the previous owners cut off the mufflers on each tailpipe. There are 2 problems with this:

1. While the engine does have a nice growl to it, it can get a little loud.
2. There are no longer any tailpipes sticking out of the back, which looks weird and not good.

So, I was hoping to get some advice for replacement pipes. Maybe something a little quieter than what you get when you cut off your mufflers. Also, I think I read somewhere that you have to use special pipes with the SPT package or something like that?

Thanks in advance.