Thanks for the diagram. I do not have any steering boxes at the time, or parts of them. A suggestion would be to go to a shop that sells bearings. They can micrometer what you have and using their catalogues hopefully find what you need. Also, if Toyota shows it as a part, it may be available special order from Longo Toyota, El Monte, CA. They are the largest in the USA and their parts dept often special orders items that other dealers insist you must order the whole thing for. Cruiser Dan on Mud would be my first place to check.