where to find fan switch for 1965 Dart

If the guts pulled out w/ the connector, but weren't broken apart, you might be able to re-assemble. That would be if the tangs just bent out. I was able to fix one in my 69 Dart by cutting teflon sheet to replace the melted plastic and sanding the contacts. Decades ago so my memory may be off. In all my cars, I installed a relay on the "blower hi" position. If not, the switch can melt (plus the expensive pneumo-electric push-button unit for those w/ that). True in most classic cars and I did similar in my 1980's M-B cars.