Greetings Myril. My first question is 'where' is he buried in PA? From there look up the city or town and find out what county that cemetery is located. Contact that county;s genealogical society.
Many cemeteries have been 'adopted' and have an individual who is taking the information and placing it into a database. You might get lucky and find the information just waiting for you. Or, you might catch someone in the process of doing it and get them to take a look for you.
I know it works 'cause I am from the west coast and my father is buried in Stroudsburg, PA. A kind lady told me he had a 'TEC5' on his headstone.