Generate a more complex version of this sentence Whereas the dealer oriented promotionalals were previously the lead business - by the mid-1960s a whole new market was tapped involving customizing and customizers. (Kanggo ngasilake versi sing luwih rumit saka ukara iki)
Mesthi, versi sing luwih rumit saka ukara kasebut yaiku "Nalika promosi sing fokus ing dealer sadurunge dadi bisnis sing paling penting, ing pertengahan taun 1960-an pasar anyar sing nglibatake kustomisasi lan kustomisasi, asring ana gandhengane karo tema TV lan Film, nyopir AMT, lan perusahaan model liyane. "