Have a Sanwa 6 button case for sale here for $30 + $10 ship.
The back holes were supposed to be recessed and but I glued it backwards so it’s not recessed. However, the 2 side holes are recessed.
Also, it has a vewlix layout, but I spread the joystick further away from the buttons.
Also has a cord notch in the back.
Lastly, the bottom left corner on the plexi side is slightly raised aboved the side about 1/64 of an inch. I think it will even out with a good painting however.
Contact me if interested!