Found this photo of one of the Fithians on Pamelyn Ferdin's website. She, too, was in the Shirley MacLaine movie "What a Way to Go!" as was one of the Fithian twins (at left of photo). Go to:
http://www.pamelynferdin.com/gallery/what_a_way_to_go/what_a_way_to_go_01.jpg

If I recall correctly, he's at the very end of the movie.