clunk noise!

so about this clunking noise from the supposed bushings, is this worth taking to the dealer and trying to get them to fix it under warranty? (bicker) also my exhaust isnt even stable it moves around a lot and make a wierd skretching noise when i tap it while it is on, im guessing from its looseness(i believe its braced with a rubber piece, i have to look at it again). has anyone else experienced this? its something you'd kinda have to play with. i heard it when i would slowly come in my drive way when i had the music off.
 
After reading through some posts about the clunk (do a search, there is tons of info) the consensus is that the rear swaybar bushings are the culprit.

I seem to remember reading that the rear bushings on our car were natural rubber (unlike the fronts which are poly). Are these the bushings they are referring to? If so, is there an aftermarket poly replacement that will fix the clunk permanently?
 
I have the the "CLUNK" an from what I've read, Mazda has not found a way to correct the problem yet.
 
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