A low cost approach would be to just remove the mufflers and use eliminator, (straight) pipes. Also replace the resonator with an Xpipe.
I don't know if this will give you the sound you're looking for, but at least you won't trash the expensive stock mufflers, and you can return to stock anytime.
This could be accomplished by any local muffler shop.
I'd love to drive my ZR-1,(see below), through the English countryside, loud as hell.
