Or, you could just dress like a cartoon witch for no reason. I know! I know! You like categorizing personalities more than I do. But. Upon reading your post, I realized that I'm starting to dress a bit like a cartoon witch myself (or a cartoon third world revolutionary--that would be credited to the stompy black Docs and the beret)

Of course, there's always landhausmode.  I just checked the Angermaier site, to find a specific example of how it can all come together--this one was what I was thinking--but, then I saw the newer stuff.  The Freigeist collection.  Totenkopf- und Edelweiß, check, check, and check.  If you poke 'round the site proper, you can find skulls'n'pretzels'n'edelweiss.  And, ooh, ooh, isn't some of the footwear quite witchy?  (These are kinda mindbending.)