The lens on my G2 bezel got marked up somehow and now there are block spots when I shine the light. I can't get through to Surefire for some reason and they told me I had to phone it in, but is there any place online that sells the original bezels?
If you have one of the G2 bezels that uses a retaining ring for the window, then you can go to flashlightlens.com and order a replacement UCL glass window.