We installed a ELEMENT 2 in the main theatre and are moving the elderly Expression III to the smaller "Pavilion" theatre. However, a number of the EXPIII keypad buttons are badly beaten up, exacerbated by several attempts to attach plastic label printouts. Does anyone know if these are standard PC keys or where we meet be able to find some new ones that would fit? While we have every faith in the ELE2 (magnificent machine!) it always nice to know you have a somewhat similar backup working nearby.