I'm familiar with Google.
It can be hard to know what tone to infer from forum posts, sometimes. I'll give yours the benefit of the doubt, Roger.
The details of the sheet metal I'm looking for are in my first post. I suspect that very thin stock of the 7000 series alloys is uncommon because those alloys are difficult to roll. If one needed something else, like thicker sheets, or larger quantities, one would not have to do much searching, as Roger found.
Anyone else have any tips for sourcing a small quantity of very thin 7000 series aluminum sheet?