I rebuilt ours long ago, it wasn't too difficult.

Took it apart, had to use different fasteners to re-assemble.
cleaned all contacts, re-bedded resistance coil into ceramic with an appliance
touch-up paint and kept light pressure on the coil until repair was solid.

There is a link somewhere either here or one of the Charger forums.

Good luck, let us know how it goes, or with any questions.

Joe

PS If the resistance coil is FUBAR, you'll need to get another switch somewhere