Is there a GM part that is a solid piece of black plastic for the little cubby spot on the bottom right of the radio? I know there's the 1). actual cubby for storage, 2). 4 separate pieces for different switches, and 3). the top half for Onstar and two blanks below for switches. I'm wanting to put three rocker switches in the spot and would like to see if there a large blank. I pulled pictures of the three off the web to make things clear. Thanks.