The exotic tapestries of the Orient, the cool linens of South America, and the modern vinyls of American chemistry have been combined in a striking alignment to form the interior upholsteries and trim of seven special customized cars to be on public exhibit April 26 through May 3 at Lincoln-Mercury's "Style Preview of Tomorrow". Utilized by Ford Motor Company stylists to accentuate specific and definite styling themes, these fabrics have been…