Well here is the texture for the cape, but it would need someone to map it onto the formed cloak if you actually wanted to use it for anything since a flat unformed cape couldn't be added to a minifig.
The ring would need someone to model it / 3D scan it as its too old for there to be a digital file for it.
The ring would need someone to model it / 3D scan it as its too old for there to be a digital file for it.