The last I knew (he is still listed in the phone book) the very best
piano key covering service is:

  Ted Oberhaus
  Seneca Piano Key
  4977 Frontenac Road
  Trumansburg, New York 14886
  tel.: 1-607-387-3095

His work is excellent and on schedule.  Be sure to ask him to buff
the under sides of the front edges, as they can be slightly sharp if
not buffed.

Bruce Clark