Hey Ryan!
Well, I tried regular pane glass from the glass shop and it works great for... about 2 minutes after which point one hears some snaps and pings.. and the glass is cracked. I didn't know it was such a big difference between standard glass and UV coated tempered glass.
Harvey, I've asked but noone in Canada tempers glass in that size. It's simply too small and will fall through their tempering machines.
I can get it done from the US but it will be more expensive than getting it from the manufacturer.
So I've ordered some new pieces from AB but in the meantime I was hoping someone could lend me a spare one if they have one.