Peter,
Looking at the controller you posted I noticed two things that stand out most!
1) There is no identification as to who manufactured the controller.
2) There is no UL listing sticker posted in the controller.
As far as the elevator companies in your area not wanting to change out or repair the controller, put yourself in their shoes. You may have a PLC, but you are using technology and equipment that is 75+ years old. Personnaly, we wouldn't fix this elevator either. There is too much liability that goes with that type of equipment. I recommend you modernize the elevator. It's the responsible thing to do.
