If you want to spend minimal dough, you don't even need to go glass.
Pop the plastic covers off, wet sand them starting maybe with 750 or so grit and then work your way up to 1.5 or 2k grit.
Once you've done that, hit them with this 2-part clear. It's the best you can get that's not a true mixed automotive clearcoat. This stuff is awesome:
Make sure it's the high gloss clear, and wear a respirator with this since it has a hardner that gets mixed in.
A lot of videos show 1-2 coats. If it allows, I usually do an extra coat because I'd let the last coat dry, then hit it again with 1.5-2k wet sanding to get rid of any paint imperfections (ie orange peel).
Take a buffing compound with a DA buffer (or just elbow grease if you don't have access to one) and they will come out crystal clear, likely as good or better than factory. That clearcoat will last a REALLY long time. It's not like the cheap ones you get off the shelf at the automotive store.
Or spend more money for retrofitted headlights with new lenses, or make a DIY set.
Those are about your options there.
Good luck, follow up and let us know what you decide!
Edit; my apologizes about the larger pic, this forum does not allow resizing images the BBcode apparently...