Slimestone/ old mossy cobble

Minecrafts new textures change the way mossy cobblestone looks to make it more consistent with the other mossy blocks, which is good but it means that the unique slimy colour is now unavailable in the game so my idea is to simply add it back when the new textures are officially out but as a separate block. That can be found as a rare chance in a dungeon and it could be crafted using slime and cobblestone in the same way mossy is made from vines. Slime stone bricks (stairs ect...) could also be added but I think just the cobblestone is enough.