Window Panels?

Posted in Custom Workstation

Ok, say I want to make a cockpit for a vehicle or a window piece.

Problem is, I don't have any clear plastic or or anything along those lines I could use(like a big enough windshield piece)

Any ideas on what could be used to make one?

I was thinking along the lines of maybe the clamshell or box ML figures come in but I don't know how well that could or kept shaped.