Here is an example of a stained glass lamp repair which took only a few hours and didn't cost but a few cents. The repair of this lamp by a stained glass shop would be costly indeed, since it requires the production of a mould, as well as slumping of a piece of glass.  Here I used the broken pieces and a few jewels and while its not "original" in the sense of being restored to its original self, it is "original" in the concept. For 5 bucks I will design you a repair IDEA, for a broken panel for your lamp. Send pix and measurements, as these are required.