Lincoln Land should be able to hook you up. You can find them here : http://www.lincolnlandinc.com/

And it appears this person has done the joint on a 64 : http://bigfancycar.blogspot.com/2014/04/a-diy-guide-to-rag-jointsteering.html

If you have enough skill to replace it. Yous should have enough skill to rebuild it. Use to swap it. The directions on the link above are good. I have found the part as cheap as $9 on amazon. I know I’m late.
edit link didn’t work
http://www.dormanproducts.com/p-2993-31000.aspx?origin=keyword