Modern Top Fuel Roll Cage Helmet Shield?

[jlucky]

Just wondering if any of you builders have any thoughts on how best to duplicate the modern Top Fuel Roll Cage Helmet back shield?

[espo]

Find a very thin material that you can easily shape to fit inside the roll bar. I don't know if a thin plastic would be shapeable enough without heat to make it fit. Maybe a small piece of a paper product of some sort and paint to match the roll bar color? 

[SpeedAndViolence]

I would suggest starting with Tamiya tape to get a rough pattern of the inside, then grab a cheap tinfoil cake pan. I have never tried it myself, but I do agree with @espo, even the thinnest sheet plastic available currently, will not be flexible enough. 

[iBorg]

What about looking at preformed plastic from things like a drink bottle or preformed plastic from packaging?