We have a tiled walk in shower and I would like to add a couple of corner sheves without breaking out the tile for fear of too much damage and no spare tiles. I would also like the shelves to look like they "belong" so the ones that are metal or plastic really will not do. I would pfere something molded that looks like ceramic in cream or white. I envision attaching the shelves in to the tile and then caulking around them with a caulk that resembles the grout. Can anybody assist me with sourcing the shelves?