does anyone know where to get black plastic bezels for switches (emergency flasher, headlights, fog lights etc)?

I bought some from sierra madre to replace some on my headlight switch and emergency light switch, however they were wrong.

the original one had threads on the inside diameter of the bezel, and screwed on to the switch itself. this one has no threads on the inside diameter, and has a part that sticks out in the back with threads on the outside.. it looks almost exactly the same as the original part, but wont work..

so, anyone know where to get the correct replacement bezels?