Dusty Springfield bio-tuner “Forever Dusty,” a retooled version of a show that played L.A. in 2008, has skedded an Off Broadway run that starts this fall.Formerly called “Stay Forever: The Life and Music of Dusty Springfield,” the musical arrives in Gotham with helmer Randal Myler and co-book writer Jonathan Vankin now onboard. Lead thesp and co-writer Kirsten Holly Smith remains attached. Myler has made something of a specialty directing tuners about musical legends, with a string of credits that includes Janis Joplin tuner “Love, Janis”; “Dream a Little Dream,” about the Mamas and the Papas; “Hank Williams: Lost Highway”; and “Almost Heaven: The Songs of John Denver.” All played Off Broadway. Book by Smith and journo/comicbook scribe Vankin follows Springfield’s life from Catholic schoolgirl to star, incorporating live perfs of tunes from the singer’s career. Smith portrays Dusty, with further casting to be set. “CSI” cast member Jorja Fox — who also produced the show’s L.A. run — is onboard the producing team of Off Broadway version, joined by Leslie Brockett, Jane Gullong and Sandalphon Prods. Eva Price (“Peter and the Starcatcher,” “Annie”) of Maximum Entertainment Prods. has signed on as exec producer. “Forever Dusty” begins previews Nov. 11 ahead of a Nov. 18 opening at New World Stages.