Here is what it looked like...in the first image below you can see where I jammed the square shaped spacer down around the square part of the quill. Then I had to repeat that until I finally got it tight. I greased it well also. Hope this helps. I wrapped the .016" brass around a 1/2 inch socket piece to form it.
Can that square shank be drilled and tapped for a 1/4" or 5/16" thread? Then screw a tall bolt into it and epoxy a ball bearing onto the top of the assembly for the bolt to slide through.
Jerry