Haven't searched, but I do know that there is a product available. It was installed on my RV headlights when the rig negotiated the AlCAN highway a decade ago. Did the job in protecting the headlight lenses.
It was self adhesive so easy to apply. A brown discoloration will begin to creep in around the edges after a few years.
2000 MT Citrus(DogBite); 2000 MT Citrus LTO Conversion; 2001 MT(Aeromodded Hypermiler - 134.4MPG); 2006 MT