Like i said first replace the lower if it's worn. Then check the top again. Have a read over the various other posts on mount experience before you go spending money
That's correct. Plenty of threads on it. Powerflex being the most cost effective solution. I run Powerflex in the lower mount only. No track days so solid mount would be over kill
From experience the mounts don't usually wear out one at a time. If you replace the top usually your would need to at least check the lower dogbone. Any shop with a lift can do it.