Did you work at Ford dealership in 1979 on the 79 Cars? If so, did the covers look like this?
This one has a D3 part # on it. Thanks for your help!
The cover looks very similar on the exposed side but the bottom side
is much different, it has three locating tabs for the big hole and another
to the side. It has a D8BF-18A927-BA number on it which is 78 Fairmont.
These covers are also plastic and the foam padding has adhesive to hold it on.
I worked at the Ford dealership from 1976 to 1985 mainly in the parts dept
but worked in the service dept in "new car prep" for a couple of years from
1980 to 1982. I remember when the Pace cars came in, in fact the dealership
was in Indianapolis, we ended up having about 10 Pace cars. I was also in
the local Mustang club which we participated in the 500 festival activities at
the track and saw several of the festival cars that were driven around Indianapolis
for the month of May. They were all 5.0 automatics and were low serial numbers.