I am glad to report that Steinway have saved the situation.After much work, they have worked on the sides of all the keys and adjusted the pins to as to re-lay the keyboard. The result is that the keyboard now has a normal appearance and the original key coverings have been saved. It was not possible for them to locate a new set of ivory plates for the entire keyboard and matching just a few was obviously not going to work given what was available. Of course a little extra care in the first place would have removed the necessity for all of this.