How can I arrange elevator access to the Acropolis?

We will be in Athens in late September. My companion is 81 years old and I am 75. Although we are not officially handicapped and do not use wheelchairs, she uses hiking poles for balance. Walking up many stairs is difficult for us. How could we arrange to ascend the Acropolis hill without climbing too many stairs? We would be quite willing to pay an extra fee for easier access because I doubt that she could get to the Parthenon by walking.