aftermarket rear sway bar 67 up A body

That looks like the Addco bar. I have one. You can buy poly end link bushes. Or, I have a box of used rubber ones -- you would need 8.

BTW I didn't have to reroute any lines. Just bent up the little tab that holds the brake line against the axle, enough so that the u-bolt can go under the brake line.

Oh, the end links are nothing special. You can just buy long bolts or use threaded rod. They don't really take any shear stress, only compression and tension, and that is mitigated by the rubber bushes.