You need this, though it's been done a million times before.
A custom made D-Pad, directional pad or plus control pad. Whatever you want to call it, here it is.
Perfect Virtual d-pad display for retro games.
5 images (idle, left pressed, right pressed, down pressed, and up pressed)
Dimensions 256 X 256
Bit Depth 32
PNG image
End User Licence Agreement (EULA).
initial commit