Help me find my cousin.

MIA.
I am looking for my long-lost cousin, Stephen Shelby Webb. I last saw and talked with him in Roseburg, Oregon back in 1973 when spouse and I stopped at a Denney’s and met him there. Steve as I called him was a bus driver in Roseburg and formerly a shipmate on an intelligence gathering navy boat and the sister ship to the Pueblo. Steve spoke Russian and his ship hung around the waters off Siberia.
But anyway, Steve was adopted and his birth family was Zimmerman. He left his Webb family under harsh feelings. His adopted mother, my aunt, was sort of a witch spelled with a B. I spent many weekends out at his family’s house before he got married. His adopting brother David Webb said yes, their mother Abley ran Steve off. Last I heard Steve was president of the bus drivers union. But I can only guess at this point, Steve must be retired. I have done some search and came up with nothing. If you know any retired or currently old bus drivers in Roseburg ask if he or she knows Steve Webb or Steve Zimmerman. Thanks for any help.