Try Porcelanosa USA. I visited their showroom in San Jose, CA and fell in love! I think they make tiles up to 40 or so inches long. Large photos of George Clooney all over the showroom may mean he is a spokesman for the company. LOL! We fell in love with 'Meridian Bianco' from their line. Thinking about this for our shower room.

DalTile has a huge selection of unglazed porcelain mosaic tiles in the classic hexagon and 1" squares, and basketweave. I've used them before in baths and loved it. Here is a link that might be useful: DalTile Mosaic tiles This post was edited by lazygardens on Thu, Jan 10, 13 at 8:47

I was trying to figure out what to do with my kitchen tile---yellow, probably 50s.....same kind of a thing as you.....caused by replacing a countertop that had post-formed backsplash. I found some places that would custom make tile to match. Try searching on "custom replacement tile" or something like that. As it turned out, I found a very close match in new tile so I didn't have to have any made. Weirdly, I found a close color match at Home Depot from the United States Ceramic Tile Company. The sample board for special orders was placed way up high on the wall and I almost missed it. I did separate the old tile from the new tile with a black liner tile so that the colors weren't right next to each other. They are very, very close in color though. I practically had a nervous breakdown before I found them, expecting to have a huge problem. If you can't find something, can you think of any kind of a skinny little cabinet or something to put there that wouldn't look totally odd? Sometimes the stuff I like the best comes out of a situation like this.

She means The Tile Shop. Remember when we used to capitalize? This reminds me of a ceramic tile mural Ickaisgirl has in her kitchen. She used subways for her field tile, so it was a ceramic tile that came in mosaics and field tile. I have a photo of her mural on my laptop and I'd have to search for her kitchen reveal to find the tile company. Her tile is gray but it has that same quality of looking like beautiful, high-end tile. So you could ask in Kitchens since there's more tile experts there.