How to set up virtual D-Pad for iOS?

I have managed to add the standard mobile asset “Single Joystick” to my app and it appears to be working fine. I would like to switch to a D-Pad type input because I feel that it will be better suited for my game. How can this be achieved?

Is there a standard asset for this?

I dont have Unity iOS but i assume you could add buttons with Arrow Textures in the form you want with input.touches.