Yehuda,

You don't specify what databases you have searched.  Here are some recommendations:

https://www.jewishgen.org/Communities/community.php?usbgn=-529736
Info on Stanisławów.

https://www.jewishgen.org/databases/
Listing of the JewishGen databases.  You can search for records from the town and for the surname.  You can search the FamilyFinder Database to see if anyone else is searching your surname and/or town.  And, many other databases.

https://genealogyindexer.org/
Search old digitized city directories for Eastern Europe and other locations.

https://en.wikipedia.org/wiki/Wikipedia:List_of_online_newspaper_archives
Listings of digitized historical newspapers from around the world (by geographic location.)

www.ancestry.com
and
www.familysearch.org
Search worldwide records databases.  I suggest searching passenger manifests and naturalization records.  You may find relatives that emigrated well before WW11, during the 1930's or after WW11.

Keep in mind that in many records the town name may be spelled in variant ways.

Hope this helps,

Sherri Bobish