Does anybody here know where I can get parts for a Challenger panleboard? I can't seem to track down a manufacturer web site that might contain part number info, model descriptions and part numbers, line drawings, etc.

Specifically, I'm trying to replace the busbar assembly in a panelboard (sub panel) that got smoked. Replacement of the entire panel is an option, but it's installed in plaster with EMT coming into the top and bottom, and I would like to be able to save my customer a few $$ and myself a few headaches. The rest of the hardware in the panel appears to be a-ok, and no other components were scorched in the incident.

Any guidance would be greatly appreciated.

Thanks!