How to find lawyer in Poland to contest ZUS (social security) benefit amount

I am trying to find a polish lawyer that can contest benefits awarded by ZUS for someone. He is a polish citizen living in the US for a long time. Traveling to Poland is difficult. and he doesn't have any living family left there.

I'd do a search for the keyword "prawnik" (lawyer) and add a name of the area / town to get leads. Most lawyers in Poland, especially from the new generation, should be able to speak English (if not, they have automatic translators).