I believe that the following link is to the IDF in question that you can obtain their contact information for some guidance.
http://www.fidf.org
Good Luck! :-))
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~Brian D. Kerr, Esq | SSG, U.S. Army (Retired) | SSA, Brigade G1, U.S. Army (Retired) |>>Known Family Surnames (Researching): Dessler, Walk(Valk), Mahler (Maler), Paradisgarten (Paradisegarten), Tomasy (Thomashy), Gluck, Preisz (Priess), Steinhardt (Steinhart), Grossman (Grosman), Sholtz (Shultz), Kaplan, Bloom, Fischer (Fisher), Levy, Baum, Duwidewic, Meisal (Maisel)<<|>>Known Family Locations/Regions (of Surnames): Poland, Ukraine, Russia, Hungary, Lithuania<<|