UV filtering plastics

I have a small collection of figures that I have been looking to make some cases for. I recently found out that Funko has vaulted the series which was part of the reason why I've decided to enclose them in something to protect the resale value should I decide to in the future. However looking on ebay a problem with some of them seems to be fading on the boxes and in some cases the figure as a result of display.

Now while there collectables I don't really want to box them up as I like to see them so ideally to prevent the light fading them I'd want to have the material block as much UV as possible I know there are types of glass that does this but I am wondering if anyone knows of any clear plastic which would do the same

I got some Krylon UV resistant clear spray and sprayed the glass, it worked a charm.