Sounds like a good excuse to upgrade the LCA's and/or shocks.
I suggest putting a jack stand under the left axle tube and removing the tire. Confirm the stand is solidly in place. Then, have a friend push straight down on the fender. Listen from next to but not underneath the car. Hopefully, this will help you pinpoint the source of the noise.
Incidentally, I've made it practice to spray Armor All on all rubber bushings, CV joint boots, rack and pinion boots etc whenever I do an oil change or rotate the tires on any of my cars. It seems like this practice slows the aging/wear process somewhat.