Just one more quick thought. It might be worth trying double tape on your bars first. I believe that different tapes do better or poorer jobs of dampening vibrations, and tape is much cheaper than new bars.
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A conclusion is the place where you got tired of thinking. - S. Wright
Favorite rides in the stable: Indy Fab CJ Ti - Colnago MXL - S-Works Roubaix - Habanero Team Issue - Jamis Eclipse carbon/831