[aerohead]

I've no idea what the cost was, but on an episode of 'Rick's Restorations', a local Las Vegas, Nevada sign company created high density foam tooling using AUTO-CAD-CAM, used to vacuum-form heated polycarbonate sheet material over, creating a clear structure, much like poly skylights are formed.
It would be interesting to know what Lexan covers like this would fetch.
The Mercedes' EQXX concept wheels are completely 'sealed' like this would be.