Where's the movie about her?

While reading Strange But True America today, I came across the story of Buffalo Calf Road Woman, a Northern Cheyenne woman who not only risked her life to rescue her wounded brother on a battlefield, but also fought alongside her husband at the Battle of Little Bighorn and apparently gave Custer the last blow before his death! Now there's a heroine worthy of her own movie (and please not a travesty like Disney's Pocahontas).