Why buy a book on learning runes from Llewellyn or Weiser when you can learn from the people who clung to them the longest?
But you say that they stopped using them a century ago? That is nothing in the spiritual tourism market. “My grandfather taught me the secret tradition that he preserved!”
If they are trying to keep Elfdalian Norse alive, bring the runes along too. Open some B&Bs, some small hotels decorated with runic inscriptions, some charming restaurants. Teach “runic yoga.” Never mind that it was not invented there. This is tradition we are talking about.