Red tail light lenses

[572Camaro]

I am trying to help a friend improve the brightness of his factory tail lights on his 1940 Chevy Special Deluxe hot rod.
We have tried LEDs, halogen 1157 bulbs, chrome backing inside housing, and etc.
Problem is available lenses are thick dark red glass and block excessive light.

DOES ANYBODY KNOW of a company that can machine red plastic in the lense shape?

Any other thoughts?

3D printing is not a best option here.