The AIM shows a "cover" installed with tape to the underside of the dash panel to cover the speaker grill when no speakers were installed there.
See UPC1 B2 #9 -3903481 (and #10 -3839835)
I have plenty of the tape

, but what type of material was this cover made of please? I don't expect to find a repro one and intend to make a replacement myself.
I can only assume is was of a cardboard type material and is black. Am I close? Any pics would be very helpful.
Thanks.
