Many antique dealers specifically search out Bausch and Lomb shooting glasses because of the high resale value of vintage optics from this maker.
Most shooting glasses are designed to protect the shooter's eyes from sunlight, wind, particles and objects.
There are lots of places on the Internet where you should be able to track down a high quality pair of these popular shooting glasses.
Bausch & Lomb - Directly from the company's own website is also one of the best ways to learn more about finding a good pair of sporting glasses that double as excellent shooting glasses.
Extreme Eyewear - Many small, private retail websites also offer excellent resources for locating the pair of shooting glasses that you're searching for.