Who Makes The Most Quiet Muffler for 68 340 GTS

I would like a stock sounding muffler(s) for my 68 340 GTS. I want it to be as quiet as it was back in the day. Currently, it has something called Turbo Sonic mufflers. WAY too loud. I read some threads which mentioned Accurate LTD. Are these the closest to stock that is currently available?
Thanks,
Bill