Hi Chippymart
Great shame you're at the other end of the country from me as I could possibly have a solution.
My much loved Elu 157E died a few years ago though from memory is was a gearing part and the motor is ok. I remember searching for parts but they were either too expensive or not available at the time.
A bit older than yours at about 20+ years but I don't think they changed anything on later models and the only difference between my" E" version and standard was the electronic controller.
I'm happy to give it away foc for spares but it would be difficult for me to post or courier it as we both work and nowhere near a post office. Not in often either to wait for a courier to collect, but if you have anyone in this part of the world who could collect, it's yours if you want it.
I have the sanding frame for it as well and the original instruction booklet.
Bob