2 liter 4.10 speedo drive and yoke.

I need a 2 liter speedo drive assembly for a 4.10 rear end. I need both the drive and the yoke. (is that what you call it?) I believe that it would have 13 teeth on the drive gear, and 6 on the worm gear.....but I am open to being corrected!

Anybody have such a creature?

Thanks,
Jon