This is kinda urgent and specific - are there any ways of curing diseases without the Cure Disease ritual or Heal check attendance?

My players are no way near Heal and they have a task to somehow cure a small community of people infected with Soul Rot and Cemetery Rot, before they all die and turn into dreadful undead!
Is there some sort of an item, "holy water thing" or similar which can cure people's diseases in the books, or should I make something up?

Thanks in advance!