There is a tree on Ancestry.com submitted for these family names, which shows they originated in:
Ostrowy, Galicia, Austria (now Ostrowy Tuszowskie, Rzeszów, Poland
Trzesówka,Galicia Austria (now Trzesówka, Rzeszów, Poland).
I will contact you by e-mail to see if I can help put you in touch with the submitter of the tree.
There are microfilms of Roman Catholic church records at the LDS (Mormon) Family History Library in Salt Lake City, which cover the time period 1800-1870 - 6 rolls of microfilm which can be rented at your nearest LDS Family History Center for a small fee.The records are in Latin and Polish.