Here are the roof rail seals for your 1969-1970 Chevrolet Impala and Caprice 2-door hardtop Sport or Fastback models, not for standard hardtop, sold as a set.
Here are the door seals for the 1971-1976 Buick LeSabre and Centurian, Cadillac Eldorado, Chevrolet Impala and Caprice, Oldsmobile 88 and Pontiac Catalina and Grandville convertible cars as well as 2-door hardtops.