My car is a 1998, although I doubt those upper plates changed from 1993-2002. I do not need the upper A-arms/control arms, I only need the plates which they mount to. Unfortunately, in the official GM parts manual, there isn't even a part number for the plates. It lists them as "N.A." (part #3) and and says that they are included with the front upper control arms, part #8, along with parts 3-6.
Actually, knowing that, your advice may save me some money.
The cheapest I could find, was GM PartsOutlet, at a little over $450 for the pair. That is still nuts, but way better than $700.
Suspension is the full Strano setup of springs, anti-roll bars, Koni yellows, and 1LE bushings.