Remote control for lift buttons

  As a wheelchair user I love lifts but I can't reach the buttons - especially the ones at the top... I think it wouldn't be difficult to make a remote control like for TV to allow me to type the floor number I need (or alarm button etc.) and send it to a receiver built into the panel. Buttons would operate as normal for those who don't need the remote.
  This might also help visually impaired as they could have a braille or voice activated remote. People who need the remote could buy one cheaply like they do now for Radar keys for adapted public toilets.
  I figure most lifts are made by just a few companies so technology/standards should be able to be agreed without a lot of complexity.
  All the technology exists... its just new application of it.