Best exhaust for my application?

could someone help me? I own a brasilian charger, which is the same body of the dart, A-body, with the 318 engine withstock heads , but I would buy a header that possesses the same design TTI or Doug's D453, but with a more affordable price, because I have to import to Brazil and freight is very expensive, could someone point me to some manufacturer or similar model?

TTi and Dougs are it for that design. You have to have a custom made set is the only other option.