My F150 has a lot of room on the button bar underneath the stereo and air controls, between Max AC and Circulate buttons, they have a factory filler bar there.

is there anywhere I can buy custom buttons that look like they were factory made? Can I even remove that "filler bar" to add my own? I've attached an image of where I'm talking about. Except on mine there's just two buttons, one left, filler in middle, and one right side.