I pulled a near new center link off the 69 Electra in the El Paso yard. If you wind up needing one, and it is the same, let me know.
I'm also wondering if maybe the seals in the pitman SHAFT are shot....and that might be the source of the wiggle.....those I can get. I'll check the centre link as well
All the seals do is "seal" the pitman shaft to the steering box; they don't control any play in the steering.