SOS-Parts source for old Ohmite Variac
 

Does anyone know of any sources where I might obtain brushes for an old
Ohmite Variac (autotransformer)? Ohmite quit making them 5 to 10 years ago
and, as with anything manufactured anymore...if it's older than a week or
so, the manufacturer drops parts support.

I have been cautioned against using brushes made for electric motors so I'd
appreciate anyone with a source for these kinds of brushes.

Thanks!

Smokey W9STB
All CW - All vintage