Since "Pul Pul" is a famous Armenian melody (often associated with the Duduk or Percussion ), check specialized folk music databases.
If you are trying to find the file online, here are the most likely places to look based on the title: Download pul pul part pdf
Many arrangements for individual parts (like flute, violin, or percussion) are uploaded by users on MuseScore.com. Since "Pul Pul" is a famous Armenian melody
If "Pul Pul" is part of a larger classical or public domain suite, search IMSLP for the composer's name. search IMSLP for the composer's name.