The new glass will be ordered on Friday. I'm not sure if it's something they can do the same day I'm there if it's something they'll have to have a few days to do.
The good news is that I'm replacing both side panels and the main viewing pane. I'll use one of the older panes in the back still. Since this will pretty much be a holding tank for a while, I'm not too worried about it. Once next years' project is ready, I'll convert this tank into a planted community tank with a 3d background that will hide the back pane anyway. Now for the waiting...grrr