Non legible digital display on odometer?

My speedometer display screen 78100-sna-a131 (LCD1) and fuel level display screen (LCD3) were not displaying the speed digits and bars properly. After opening the unit, I observed that there was a thin sheet of nylon/gel like material that was used to cover the display/Screen. This material has deformed and looks wrinkled, hence why the digits and bars were not legible. I thought removing it would solve the visual problem, but it turned out that when removed, you see nothing but amber light being emitted.
I would like to know if this nylon-like material can be gotten as it is what makes the digits and bars visible.

Regards,
Kema