Magnet18 and i were just talking about those Airstream Entertainment centers. Lot of things have changed technology wise since they installed them, but a nice new face plate would allow for lots of add-ons, like gauges, switches and USB ports. Airstream stopped installing them mid 1983 with the new doghouse style.
I think they are well worth saving and improving.
This is what I did to mine some 20 years ago, when I restored a 1979 just like yours.
1994 30' Excella Front Kitchen Trailer
1990 25' Excella Travel trailer
1992 350LE Classic Touring Coach