contact,Bob Slade Engines ?

i hope that someone can help me

Does anyone have contacts to Bob Slade Engines of Salinas ?
He rebuilt the Boxer Alfa Romeo 12 cylinder tipo 177(?)..
now ,here in Switzerland ,is such a engine but we don't have any techn.rebuilds dates...valve job....
or anyone have another contact address?
any help are appreciated !
thank you
ivo