Tile for Vestibule to Match Old

I am looking for unglazed quarry tile to match the ones that have come out of our mosaic inside the vestibule….then of course will be looking for ideas how to repair/replace. We used 1 x 1 white hex tile in the bathroom reno and I dropped a few in here to see how it looks (tile is much thinner these days!) but haven’t seen this 1/2″ x 1/2″ clay (I guess) tile anywhere. Classic Tile doesn’t have it….closest they get is terra cotta glazed. I am thinking a salvage place….but local, I hope. Thanks in advance.