With native set transformation, bernarde should sell holy water for 5 darion badges. This is what npc says:
https://drive.google.com/file/d/0B4kmqz6Vv2IaVkpONHhUMTBQOEE/view?usp=sharing
there is no option to obtain bottle of holy water.
im not quite sure if every guide match with these eu files, try talk with some other npc in the houses near
i don't remember i had such a problem during lvl-in the stages