Prothane Suspension Parts - Precision Polyurethane Bushings
Energy Suspension Parts - Polyurethane Suspension Bushings
You'll have to study up here; they don't sell LCA bushings per se, but there's some that will fit and work fine. Prothane's seem to fit just right; the Energy Suspensions need to be massaged a bit.
You'll still need to put something in to fill up the space between the bushing and the frame, unless you also put the toe link compensator back in.
(Jay's bushings have a mushroom to replace the unneeded toe comp; that's about $80 to $100 right there!)