Yes, Fishbein said they’d never met (his real quote is actually better: “In 26 years of investigating charlatans, I have never met one personally”).
However, sources differ on whether or not Brinkley and Fishbein had ever met, or whether whatever happened on the Normandie (see note 241) counts as “meeting” one another.
"'In 26 years of investigating charlatans, I have never met one personally,' Dr. Fishbein said." ("Fishbein On The Stand," Associated Press, The Iola Register, 24 Mar 1939, Fri, Page 1)
Speaking to Shruben in 1978, Minnie Brinkley reminisced that her husband had for a time attended medical school with Fishbein, remembering him as a "poor Jew boy." (“The Wizard of Milford,” Francis Shruben, Kansas History 14 (winter 1991-1992) p. 230-1).