This may sound funny but I may have stumbled onto something you might want to try before spending a lot of money on the triple clamp.
I have an '08 AE that was bothering me with vibration at 4k. I have a PCV with auto tune and had done a throttle sync. also Throttlemeister heavy bar ends. These helped some but the single biggest improvement I have gotten so far was to switch to 20W-50 Mobil-1 V-Twin oil. I have always used the 10W-40 Mobil-1 motorcycle oil. I live in Arizona and ride in +100 deg weather often so when I learned Yamaha is recommending 20W-50 in the new FJR I tried it. Like I said the whole engine seems quieter. I think the heavier oil must dampen internal vibrations better. The vibration in the bars has been reduced to the point where its not an issue for me. I am sold on this oil. Hope this helps. Its a lot cheaper than a triple clamp.
I don't understand why anyone would think that a different triple clamp would reduce vibes. Maybe I'm not getting the idea here. I am interested in this 20w-50 oil though. My 08 starts the high pitch vibes at around 4k also. Smooths out a little after that them kicks in again around 6 or 7k. I have a case of the 20w-50 I was going to run through my Vmax, but I may have to try it on the next change on the FJR and see what happens.
GP