Stop tossing parts at it! Go to a Firestone and tell them you want a Complete Vehicle Inspection, and tell them the sloppy steering is your main concern. This used to be 19.99 for the inspection. Also, ask for an alignment check with a printout. That also used to be 19.99. Some places will do it for free. Post the printout here. I wouldn't go back to that alignment shop ever again. They are BSing you when they say there's not much to align. Full camber and caster are adjustable with shims. They either don't want to spend the time to properly adjust it, or they don't have a tech that is an old fart, and has done a bazillion of them. Plus, (and this is just my opinion) I think it's pretty shady not to provide the customer with a before and after printout, of any alignment work done. That's not cool.
There's still a lot of stuff that could be bad. *** see next post ***Hammered control arm bushings? Worn out control arm shafts? Maybe your shafts are loose, and the shims fell out?(doubtful, it would probably klunk). *** see next post ***Plus everything the guys already mentioned. Anyways, save yourself some cash and time, and get a pro on it. Just my 2 cents trying to help....
