I guess the used airstream parts community is a small one.
Two of the vents had been swithced to white plastic skylight types. The
center one had not. I was going to to eventually track down 2 old ones.
I have been liberated of my original and vinatage center vent cover.
I don't know exzclty when it disappeared, but that's all they took.
I'd look for a replacement, but I would guess I will be buying 1 or 3
that are just taken from somebody elses.
I guess it's a milk white skylight in the center for now.
marc