Are there plugs for radio bezel switches?

I recently converted the double din in my 2000GT to a double din panel. I decided to fill or cover the holes where the three switches go. I dont feel like paying $50/ switch just to cover up the holes. Are there any plugs available in the market? If not, I guess I will just cut a piece of black plastic or something.

Any help appreciated.

Thanks.

I think I'll just make some kind of filler and just cover up the holes.