I've priced the Moog stuff, and the whole smash, including control arm bushings, ball joints and complete linkage, minus the idler, which I already have, goes for around $310-363, depending on where you get it, with Autopartsgiant.com being cheapest. Rockauto.com was slightly cheaper, but shipping bounced it up.
There may be someone else cheaper, but I really didn't feel like digging deeper since I had already decided on the AC stuff, since the stock pieces have done very well, with the exception of the idler.
The GM/Spicer stuff, again, minus the idler which I would get the Moog piece for anyway, comes to $256 using GMpartsdirect.com for the pricing. I would go through Dal, but his prices are usually in that ballpark.