diff --git a/lib/get_teilestamm.py b/lib/get_teilestamm.py
new file mode 100644
index 0000000..9083713
--- /dev/null
+++ b/lib/get_teilestamm.py
@@ -0,0 +1,31 @@
+import argparse
+import os
+from manage_configs import MigrationStatus
+import update_database
+
+class FetchSivasTeilestamm:
+    def __init__(self, assembly_json_name, assembly_json_out_dir=os.environ.get('CREMIG_DATA'), csv_out_dir=os.environ.get('CREMIG_DATA')):
+        self.migration = MigrationStatus(assembly_json_out_dir, str(assembly_json_name).replace('.json', "") + ".json")
+        self.csv_out_dir = csv_out_dir
+
+    def get_unmigrated_teilstamm_csvs(self):
+        """Generiert CSV-Dateien für alle noch nicht migrierten Stücklistenteile der angegebenen Baugruppennummer"""
+        unmigrated_ids = self.migration.get_unmigrated_ids()
+        update_database.get_sivas_teilestamm(unmigrated_ids, self.csv_out_dir)
+
+
+if __name__ == '__main__':
+    parser = argparse.ArgumentParser(description='fetches data from sivas or ruledesigner fusion', prog='update_database')
+    parser.add_argument('-s', '--sivasid', action='store', help='fetch teilestamm-data for all unmigrated parts in the bom of a given asm-id. Specifiy multiple ids as comma separated values without space, e.g. 200000089,200000090', metavar='id(s)')
+    args = parser.parse_args()
+
+    out_dir = os.environ.get('CREMIG_DATA')
+
+    if args.sivasid:
+        sivas_asm_id = args.sivasid.strip().replace(".json","")
+        update_database.get_rd_dbase()
+        sivas_teilestamm = FetchSivasTeilestamm(out_dir, sivas_asm_id)
+        sivas_teilestamm.get_unmigrated_teilstamm_csvs()
+
+    else:
+        parser.print_help()
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