wiring for light behind the heater switch

[hpcgmc]

While trying to re install my heater control panel, I pulled out the wire that goes into the bulb holder for the heater control panel light. I can't find a replacement for that tiny little copper cap that the wire crimps onto, which keeps the wire from pulling out. Does this make sense?

Is there a company that makes just the bulb holder that pops into the back of a non a/c heater panel, and the wire and connector that goes with it (only about 5" long)?

Or, is the little copper crimp cap something that I could find at a specialty electric store? I checked Radio Shack, but they don't seem to sell much little stuff anymore.

Thanks for any ideas.