Pizza oven tile finish

Hi,

I just finished the stucco work on my Mattone Cupola pizza oven. I really want to finish it with tile and am looking at square glass tiles (like this: https://www.brickwoodovens.com/mertz-family-wood-fired-outdoor-brick-pizza-oven-with-propane-burner.html#.Xpn9AchKg2w).

I’m having a difficult time finding them. Any suggestions on where to get them (online, of course, given the situation).

Best,

Danny