What parts are you looking for?
Have you tried:
Ebay, type in the search box "79 Chevy Impala (or Carpice)"
CraigList,
Local Salvage Yards?
Did you know that most parts of the Caprice will also fit the Impala? Outside lights will not though.
There are a few Caprices in a salvage yard about 20 miles north of where I live, I can try looking there for needed parts.
By the way I live in Denison, I just saw that you are also in the Sherman area.:hello: