What a great find. Just when you think they're extinct in the wild, another fish jumps into your boat.
I'm sure it was hot in that van, but the Motorola CRT gaskets tended to turn into mush no matter where they were stored. Almost every 7-inch Motorola has a bad one. There is a guy on eBay who sells repros.
Phil Nelson
Phil's Old Radios
http://antiqueradio.org/index.html