When I have needed to have glass cut and installed in a door frame for a clock, I go to the glass place by the corner of 1st Ave (Tate Blvd.) and Center St. They can probably take care of anything you want.:widea:
If you are happy with 'just glass' then any Ace, Lowes HD will do. If you want 'non-glare' actual frame glass then you will have to visit a glass specialty shop. Check your yellow pages for a glass shop.