Hi Dan,
I have a 47/8, which when I got it had no rear view mirror. My divider bar has a threaded hole. I found some old chevy trck rear view mirrors, the small arm screws straight into the divider bar. I picked up two mirrors, one screwed into the hole easily, the other did not. I didn't bother to check if it is a diferent thread, or if the threads needs to be cleaned up. Anyway... If you no longer have yiurs, it might work for you.
Chris
