The exploded view is provided by Black Widow Motorsports.
Another person was selling new swing arms with the pivot bar.
"NEW UNUSED swing arm for ALL 69 Rupp models using swing arms. Models include : Roadster, Goat, Scrambler, Digger, Sprint. Bushing NOT included! Fix that troublesome stuck swing arm. Most bushings are so seized they can not be removed and this is your fix!"