If you're open to new resources on the region, my suggestion is that you contact the Polish Museum and Library in Chicago. It's part of the Polish Roman Catholic Union, but that doesn't mean they're only experts on Catholic Poland. There is a man named Jan Lorys who runs both the museum and library. He's a walking treasure trove of Polish/Ukrainian history. Halina Misterka is their archivist and a native of Poland and also phenomenally well-versed in the region.

In addition, Dr. Bill Galush, professor emeritus of History at Loyola University in Chicago is a fantastic source of help in Polish/Ukrainian history. Here's his web page. He can explain in a page what the rest of us would need weeks to explore. http://www.luc.edu/history/faculty/galush.shtml

Finally, check out the Kollal Center in suburban Chicago. It's a great Jewish organization and full of first generation Americans whose parents lived through the Holocaust and know the stories of the region firsthand.

http://www.skokiekollel.org/history.html