I started a similar thread a short while ago. Can't find the link at the mo but if I do I'll post it.
I decided to get some stick on beam deflectors - ebay, only a few quid. These are ones which are supposed NOT to reflect too much heat.
As it's unlikely I will do much if any nightime driving, I'm only going to stick them on if needed. The problem being that they can be a b****er to get off cleanly! It's difficult to scrape the plastic cover without damage.
I have heard that Isopropyl alchohol will dissolve the sticky without damage to the plastic. I'm going to try a hidden area tonight to see the effect. I'll post results.
Hope that helps a bit!