I have a 90+ year old home in southern Louisiana. I've been told that it has a slate roof. The shingles are approximately 12"x12" and hung in a diamond fashion. Does anyone know where I might find replacement pieces? There was a small stockpile in the garage that was used up during a recent overhaul/replacement of eaves. I'm planning an addition and would like more (plus would like a few spare on hand to replace any that might get broken over time).