Casting your own tail light lens

Rainy Day Auto said
Does anyone here have any experience making a tail light lens??

I am working with a 63 valiant wagon and the tail lights are nearly impossible to find, so my idea is to make a pair.

I have one NOS lens and I am pretty sure on 63 they are the same from side to side??

Does anyone have any idea where to get the materials to make a lens??

I really don't want to use the NOS lens but I would rather make a pair so that they are replaceable because if they ever get faded or busted, then I can just re-cast another pair.

this is the easiest way. If there is no undercuts on the tail light lens. Get a good quality clear resin(with UV resistance) and some red resin dye to test for the proper color. make a 2 part mold and pour a replica. I have done the license plate cover on my 66 and am working on finishing a mold of a Lens/bezel combo that is all red and 1 piece instead of the bezel being chrome.
https://www.alumilite.com/PDFs/Printables/How to cast resins/TailLight-Casting-without-Equipment.pdf
and part 1 of 2 videos