Kurt-
Have you considered making an aftermarket LCA? Does the math work or would the finished price be in the stratosphere?
No, unless you're going long-travel (which isn't exactly common on the 100) then the OEM Toyota is the best and it's really not that bad of a price if you have to replace. Fwiw my 100 (Deathstar) has ~220k of pretty rough use (chased the Baja 1000 4 times) and I've done ball joints (555) but my bushings are still relatively tight, I'll either re-bush ($200/both arms) or replace the arms (~$600) in another year or so if I still have the rig.