I own a 1927 Dutch Colonial and recently found beautiful tile floors underneath the linoleum in the bathroom. The tile is white and honeycomb-shaped with a grayish-blackish grout between them. The problem: there are two spots where some tile is missing, and they have been filled with what looks like the grout used between the tiles. Can anything be done to salvage the floor? And if so, where can I find tiles and grout to match?