I found another movie you may be interested. It's a movie called "Grand Theft Parsons".
It's loosely based on the true story of when Phil Kaufman stole Gram Parson body and burned it at Joshua Tree. Phil Kaufman was locked up with Manson I think... and said he had sex with all of Manson's murderesses.
The movie stars Johnny Knoxville of Jackass fame, he wears Kaufman's original motorcycle jacket and rides his Harley trike. Kaufman makes a cameo appearance at the very end.
It's a crazy story if you haven't read it.