Al, I still don't understand why the ES rear end links won't work on your '99. I bought the rear end link bushings for my factory rear sway bar and they worked just as well on my Anco 7/8" sway bar. My sway bar came with the two bushings to mount it to the axle, but I had to reuse my end links. The bushings just go in place of the factory rubber busings in the end links.
My front ES bushings came with a new bar, nut and all bushings. My Anco front sway bar also included completely new hardware so I'm not using my ES front bushings now though.