I dont know if there is a blank panel that you can buy, but you can always get a piece of ABS plastic and cut a piece to fit. The plastic will be black, but if you have the dark charcoal interior, it will be a close match. But the piece can always be painted too. I was planning on cutting a piece to fit in mine for a switch, but i wired in everything to the extra channels (buttons) on my remote on my alarm instead. Hope this helps.