Yeah, they are pretty hard to find, these types of bands (at least, ones that are worth listening to).
Try Swedish band Garmarna. I find they have a similar quality, although they tend to blend folk more with ambient/electronica/tech than metal. Their albums are as varied and conceptual as Lumsk, so they are quite interesting.
Konungen och Trollkvinnan (The King and the Sorceress):
^ Yup, spoilers are our friends. When you hit the link function and the little window pops up where you insert the link, edit out the 'https' (which doesn't seem to parse), while leaving the 'http' -- seems to work.