Hello! I’m sorry, but the DT770 pads won’t fit on the Cloud’s. The 770 pads are completely circular, and not really designed to fit over anything other than Beyerdynamic headphones.
They would hang awkwardly over the oval frame of the Cloud ear cups, and I’m not sure you’d be able to get them to even stay on at all without severe modifications. By that point you’d be spending even more time and money, and it’d be easier to either buy some 770’s, or learn to live with the leatherette pads on the Clouds.
Sorry I don’t have better news for you.