Looking for '69 Roamer "Sea Wolf"

I am trying to track down my Grandfathers 1969 42ft Aluminum Hull Sedan Roamer with a 15ft beam. The Roamer was unique in that my grandfather had Michigan Tech engineers outfit the vessel with a diesel I/O between the screws on the transom for trolling lake superior in the 70's. The boat was sold as the "sea Wolf" with a picture of a wolf head on the transom to a person in Cleveland, Ohio; last our family knew. Any information to the where abouts of this vessel would be greatly appreciated. Thank you for your time.