WTB Radiator - 64 Dart - 273

Disparately seeking a '64 Dart 273 Radiator (#2445656), automatic, not AC! Have been looking feverishly and no luck! YearOne does not carry one for '64. Is there a compatible make/model/year that would expand my search?

I think this is listed as a 19" x 22" radiator in size? Maybe someone can verify?

Thanks in Advance!
rob