Headers for my 71 Demon 340.

Hi all,
I live in Aust & have a 71 Dodge Demon 340. I want to get a set of headers or extractors as we call them here. Having troubles getting them here, so I might have to get them from the states. If that's the case, what brand do you suggest? I want good quality ones. What would they cost? I'll also be getting them coated when I get them.
Cheers,
Glenn.