Surprisingly enough, No I don't think they make any warranties for the very same reason. None of the visors I have bought have been impact rated... Nobody wants to be disproven when it comes to protecting your eyesight. It's too risky.
In my 'opinion' fiberglass reinforced armor is imperious to just about anything ... if it's done for strenght, not economy, it's all variable. Fiberglass reinforced resin is tough stuff, but you have to take into consideration that it's not specifically designed for strenght and impact... This is a 'basement business'. All the manufacturers out there are doing this in their own shops... without the intervention of goverment guidelines for stress and quality testing. Doing that would put us all out of business, so we just don't reccomend it for that.
What's being asked here is just beyond the capacity of the basement industry.
Like I said, Play at your own risk. If you're not willing to do that then you shouldn't do it to begin with.