Oh, that one cant be fixed without hacking BoP itself. Luckily I do generate quite a bit of vanilla Stone, so its not extinct.
While for the Mud Brick ITEM i would agree, sadly the Mud Brick BLOCKS are crafted from that Item, and I cant really add different Recipes (that make sense) without overlapping too much.
They actually generate quite a lot already, so I would rather not increase that any further.