Sorry for the sidetrack, but I think this is relevant to your post even if not to your topic name. Just checking since I think we're using words differently, that are you looking for png images for rendering (what I understand a noise texture to be), or 2D grids of pseudorandom numerical values (what I understand a noise map to be)? For the former, search in OpenGameArt.org gives several hundred free textures (https://opengameart.org/art-search?keys=noise+textures the first two hits are huge packs)