Good luck. One of my triple panels shattered, but it was my stupid fault for forgetting to put the latch in the travel position. Of course, it was the panel with the latch catch so it has a hole in the glass that has to be drilled before tempering.
Dealership said we have to order the complete unit, frame and three panels; $750. I went to a local glass shop that can order just the panel with the hole for about $250, but my measurements have to be precise because of the latch.
I'm thinking about using plexiglass for much less money even though the panel won't match exactly.