This just in!
Actually found TWO P/N's for the rear knuckles for the post-'88 C4 Suspension:
L: 10270126 OR 10052209
R: 10270127 OR 10052210
It looks like I have L = 10052209 and R = 10270127. They are similar, but the hole for the ball joint is in a slightly different location on each.
-jeff d
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