My great grandmother - Bessie Matys - came from Fraga. It has been a most difficult place to find information out about.
PolishRoots.org is an awesome resource. This particular post, "How to Write a Letter Requesting Records in Polish" is timely and a God-send, for me at least. In it, are examples of phrases to use so that anyone essentially can write a letter requesting information.
The site itself is a wealth of information. It covers land records and maps and tips. It covers the history of Poland as well. It is a "must check out" for anyone doing Polish or Ukrainian research.