Sorry for what happend.
Can you get a new glass made for you, maybe that will be to expensive, don't know? But maybe there is a way. Ask some glassmaker is my suggestion.
But you would have to take apart the light, if you are not good with electronics it may not be feasible. If there are big capacitors in there, it can be really dangerous. Because they hold a high voltage for a long time even if you cut the power.