Hi Lee,
My original Electone, which was purchased in 1987, and had never needed repair. When parts became very virtually unavailable for this model, I purchased a used HS-8T about 7 or 8 years ago to use for parts if needed. I've never needed to use the second Electone for parts and still play both them today.
I did, later, replace the O rings on the foot pedals of both organs. These O rings weren't available, but after looking at one of the good parts, I went to the hardware store and purchased a few packages and easily made the needed repairs.