I figured out what you are talking about.
It is called: Slinger-Spindle yoke (pressed on axleshaft if used.)
The actual metal disc itself does not have a part number listed that I can find.
If you diassemble it, you will see it actually has a rubber seal and another piece. Anyway, those parts are available. It's just the actual metal disc that is not. You should remove the metal disc from your old shaft.
Then buy DANA 700014 times two and that will replace the wear pieces.
Please note that that Dana number is from 1978 and is almost certainyl superceded by another number, but a dealer can get you the new number from the old number. /forums/images/graemlins/thumb.gif
-- Mike