I do not know, have heard of, any wax drums for the recordings. My Noma station
has records to use for the sounds, my Edison Recorder has wax drums, but is around
45 years prior to the Noma station. As for needed parts, I have purchased other used stations for items I was looking for, plus, I have a couple "extra" stations to repaint or
kitbash if I should decide to, later. The next one to acquire will be the station with a green roof version.