We are working on an ancient 1920's era Otis freight elevator. The elevator has a traditional overhead machine that is geared 1:1 and runs at 50 fpm. Operation is constant pressure, so there are only 3 controller relays: Up, Down, and Potential. One of the relays has contacts that are completely eaten up, which resulted in an elevator shut down. I looked through all the normal suppliers, but I cannot find relays or relay parts that look like this. Do these still exist?