I had already prepared the panel last year when I removed the factory stereo controls from the left side that were no longer used with the Clarion unit.
All I had to do was to mount the PMX-1R into that location. It's up to you, but after trying to fab up a couple pieces to , I ended up sacrificing the panel with the buttons. I removed all the buttons but the one for the fog lights. I smoothed/flattened off the surface of that panel with a dremmel . I then cut a piece of ABS plastic , thinking it was 1/16 thick, to the shape to fit over the panel. I cut out the square opening to fit around the fog light switch. Used a heat gun to conform it to the slight bend in the panel and glued it to the surface. Looking at it , you'd never know unless I told you,which I just did. ...lol I