Rather surprised that nobody has produced something like this (so far as I know) up till now. Curious if this is a decal or self-adhesive film. Seems like selling this as a full sheet so it can be used on any vehicle would be a great idea.

Look'n Good! Problem solved! Yes, sell in large flat sheets please.

There already is something very similar, and it costs nothing. (Assuming you weld) Lenses for welding hoods come with a plastic protective film. Many are exactly the right color and they adhere very well to flat surfaces. Apply it to inside of window, trim with a no. 11 blade.

Look'n Good! Problem solved! Yes, sell in large flat sheets please.

How about adding a drop of paint to the Future. Aircraft modellers do that with tea for the canopy.

I have found food coloring works better than paint for that application, but getting the color and transparency just right takes a fair bit of trial and error. Not to mention the time and effort involved in getting a perfectly flat, consistent end result. This seems much quicker and easier.