there won't be a direct replacement, but i know for a fact that you will find the new rubber in the HELP! section. I think they're dorman parts.
I think they only sell two sizes, which are both wrong.
Junkyard or Flaming River, etc. The Flaming River rag joints (if they have one that fits) are like $100.
Here is the flaming river joint. In addition to this, you will need a small length of 3/4 DD steering shaft a few inches long.
it seems to me that we used to get a new rubber piece and instal it into a rag jt. I bet you can find that in an after market stiffer material.