Hi Guys,
It will be interesting if you find anything new out there. I finally gave up and at 90,000 miles went ahead and replaced mine with new original shocks.
I did not have any outward visible indications (shock leaking, etc) but when cornering hard you felt some undulation rather than getting firm and solid feeling into the turn. The springs are so hard that trying to test a shock by bouncing the car dosent work. A lot of the owners could tell a rear was bad by how rough it would be over speed bumps/pot holes.
A lot of people got the Bilsteins & Ranchos and raved about them in the beginning. Later, you could get most to admit that they were not as good nor would hold up like the originals. (Guess I'll get flamed for saying that....LOL But its true)
Arm your selves with the distance collapsed & extended and go hunting! Good luck!