As long as titles are still being suggested. New York Doll is 7.8 at IMDb. It has some interesting interviews with Arthur Kane, Leee Black Childers, Bob Geldof, Chrissie Hynde...
Here is a portion of the Sundance write up. New York Doll relates the meteoric rise, resounding fall, and recent all-too-brief resurrection of the seminal New York glam-rock-punk band, the New York Dolls, but it is foremost a story about the band's amazing bassist and leader, Arthur "Killer" Kane. With empathy, respect, and humor, director and friend Greg Whiteley follows Kane and interviews key musicians, friends, and colleagues to uncover the legacy of the Dolls and their significant impact on the London music scene in the dizzying heyday of the early 1970s.
It stands out from the documentaries that I have seen (which truth be told, are not that extensive.)