I'm afraid you're on a hiding to nothing. Even different batches of tiles, like wallpaper or paint, will have subtle differences that will be apparent when they are down. That's why you always make sure the tiles are all from the same batch number when ordering.
Is it possible you have spare tiles, i.e. unseen ones, under presses or cabinets in the utility room or kitchen? Or alternatively put in a mosaic in place of some tiles. Or put in a sunken shoe-wiping mat inside the utility door. You will need to get creative, but there are a number of options available.