Curious. If you were a member of Solidarity, then you were in Poland in 1980 at the earliest. Everyone was issued a PESEL in 1979 or so, so the internet says.
Not True. There were no PESEL numbers in 1980 or 1981 for that matter.
You can receive a PESEL if you were born in Poland. If you were born outside of Poland (but claim polish citizenship) you must first place your foreign, translated birth certificate in Poland. Usually Warsaw or birthplace of your parents.