They have manufactured pods from Mod Pod and InstaPod. I've never heard them so can't comment as to how they sound and they are pricey. I just got rid of my 95 YJ this summer. I just glassed up a custom pod under the centre of the dash in behind the stick shift. I replaced the stock overhead sound bar speakers with 4" 2-way Alpines and hung a set of standard 6x9 boxes from the rollbar with muffler clamps. I used to have a dual 12" ported sub box that I made to fit snuggly in the back between the back seat and the tailgate until somebody shredded my soft top and made off with my gear. It stuck up above the rear seats so anybody walking by could see I had a box in there. My next box I built low-profile to fit between the wheel wells and left if painted flat black so it just blended it. Had single 12" Alpine Type S. I also installed a motion sensing alarm after that.
How long have you been in Angus? I used to trip over a half dozen times a year to visit my buddy. Head down to Wassaga to jetski, etc. You may have seen/heard my Jeep crusin' around.