Wow! That is some research!
Bummer about the pan lead for you. Shows how times and parts change quickly nowadays. It's been 5 yrs. So.....
For my radio knobs I used 1 gallon plastic jug caps. Free with beverage. Perfect size and ridges around the edge.
IIRC I thought it was shown that the arched paneled box is angled.
As for the pack you highlighted, yeah. Um things were loose and got loose back then. But we tight now. For the record. The no video monitors add is because of me.
It's in my radio. Check my EIB application. Can't even tell it's a screen when off.
Good Luck!