I found a company located in Centreville. MI that sells the entire Charger/Commando exhaust system or just the mufflers or resonators very reasonably.
Name of the company is Waldron's Exhaust.
Link: 1965-67 Barracuda w/273ci 4bbl carb in Aluminized Steel [7760740200] - $580.00 : Waldron Exhaust, Complete Custom Exhaust Systems
Name of the company is Waldron's Exhaust.
Link: 1965-67 Barracuda w/273ci 4bbl carb in Aluminized Steel [7760740200] - $580.00 : Waldron Exhaust, Complete Custom Exhaust Systems