There are getting to be a lot of jeep owners on here.
Nice jeep BTW. I like the Overland WJ'*
If you haven't already, check out http://www.kevinsoffroad.com/ Has a lot of good stuff on there, including cat & back exhaust.
You can also just email firstname.lastname@example.org for anything for your jeep you can think of. You may know this having jeeps before though.