2005 Volkswagen Golf Need Filler Panel for Radio

We pulled a 2-high radio with poor sound quality out of the dashboard of my son's 2005 VW Golf. We replaced it with a standard height after-market sound system with superior sound and features. But that leaves a gaping hole in the dashboard about the size of a standard car radio above the new one. I searched the Internet and JC Whitney and Crutchfield catalogs. Thought this would be easy, but found nothing.

Has anyone had to deal with this before? Am I just calling it the wrong thing when I search, or do I have to break out the Plexiglas ®, Bondo ® and paint and make the thing myself?