Fabulous Furry Freak Brothers movie? UPDATED

Did you know there was a Fabulous Furry Freak Brothers movie? According to Joel Pollack of Big Planet Comics, Gilbert Shelton's underground comic was adapted into a live action short, The Fabulous Furry Freak Brothers Acquire a Groupie. This was around 1971 by a DC-area filmmaker whose company was Reel Meat. Joel did the promo art and showed it to me today. The filmmakers were Bill Pace and Celia Symbarski aided by Joel Jacobson. The actors were Jeff Wolfe as Fat Freddy, Tom Scott as Freewheelin' Frank, and Dave Eisner as Phineas. Bill Pace would be the only one likely to own a copy, Joel thinks. The movie disappeared when Shelton pulled his approval of the license.