need parts or repair for 1950s thermador double wall oven

Hi. I am trying to help my grandma out. She has a ca. 1950s double wall oven, copper color, thermador. The upper oven door is broke. A repair guy came out a couple years ago, and said it needed a cable rethreaded. He never came back. The door has been tied shut to a cupboard handle or it falls open. That happened and now the door is not seating properly at all and won't close.

I need to find the parts and a repair person. The ovens are fantastic and coordinate with the electric range top. She really wants to fix this oven set up rather than replace them.

She lives in Torrance, CA.

Any info will help. I can purchase the parts needed ASAP.

Thanks. :)