If you want correct you need to specify year, make, model, engine size. With or without A/C if it was an available option for that particular engine.
http://www.rosevillemoparts.com/reference_radiatorguide.php?SIDYou can hunt for one on E Bay or try Glen Ray Radiators.
MCG magazine ads might be another good lead to try.
http://www.imcool.com/shops/glenrayradiators/index.htmlHe's not cheap if you need one refurbished. But he does concours work.
I was quoted 700-800 to bump dings and re-core a 956 I bought that has more holes in it than Bonnie and Clydes car.
there are repro headers being made now. The font and indentations are as crisp as OEM one's were. But they look pretty good nonetheless.