Bob Barker's Suits
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I apologize that nobody has answered your question after all these years. But, I will tell you that Bob Barker's tailor is Tom Stasinis of Beverly Hills.
This link will provide more information on him @ http://beverlyhills.patch.com/listings/tom-stasinis-tailor-shop#photo-426433
And before Tom Stasinis became Barker's tailor sometime about 1986 or so, Botany 500, Bob DeChellis, and Pierre Cardin all made his suits!!! :)
Hope this all helps my friend!!! :)