OEM Muffler Dart Swinger 340

I've had Maremont mufflers on it since the late 70's when I pulled the Hookers off and went back to full exhaust. In fact its still muffler clamps on all the connections (still have boxes of them) thats how old it is. The driver side one needs attention. I can try JB Weld paste but that won't last. The car will probably go in after the fall for a instrument panel wiring problem and replacement of the heater core at one of the Restoration shops. And of course the new carb. I been able to find what I will need. The muffler is a brand new problem. Are there any actual OEM type Mufflers around without the Flowmaster kind of sound? Thinking way back when I had headers on I started with Cherry Bombs and then switched to Thrush, never ran a full exhaust with that set-up. Any advice would be appreciated. Thanks.

20240711_200414.jpg