I would like a muffler that rumbles not only when you start it ,but every gear and at a stop light..
If you want noise/rumble all the time you might want to consider deleting the muffler instead of replacing it.
If that's not an option, and drone is not a concern, then there are plenty of options out there for a direct-fit or replacement muffler. Rule of thumb is the shorter the muffler the louder the exhaust.
There are too many options to list (Flowmaster, Magnaflow, Carven, Borla, B2 Fabrication) that make direct-fit stuff let alone mufflers you can have a shop install. Got Exhaust (
www.gotexhaust.com) is a sponsor here and has a lot of options.
My recommendation is to read up and find some options you are interested in then cruise over to Youtube and search for some of those. There should be plenty of videos of people showing off their new mufflers. Many websites have videos as well showing the difference with their exhausts.
Watching videos isn't the same thing as being there but it's as close as you're going to get to find what you want without having a buddy's truck to listen to or just taking a blind leap of faith that you've found your rumble box.