sadly black fur is dropped by the anubis monster girl and they are only found in dorgania. if you haven’t been doing the story missions you will have to. thats the only way to get in dorgania, and trust me I tried. but yea that rexipe will have to be put to the side for some time if you have not been doing the story. though once you get in you can get the border opened if you talk to the king.