I hear ya about the sunroof noise, I have made no secret that I am not a fan of the noises in the Tc. I like the car itself but they do seem to have an excessive amount of rattles and such.
Kinogod the ONLY sunroof TSB for the Tc is the one I outlined in another post. The complete design of the Tc sunroof with the panoramic roof is completely different than other designs on other modles so even if there is a TSB on another model such as a Camery I doubt it will cross over to your vehicle. But I have not looked yet so I might be wrong, Ill check tomorrow at work and post the results.
I completely agree that if the noise is as bad as your describing it needs to be addressed for I have not heard anything that bad in any other Tc's I have drivin.
I also think there is a huge design flaw in the sunroof. Honestly. Just stand back and look at the way it is designed. 75% of the roof is glass which means no sound deadening material with 3 leading edjes to pick up wind. But remember, and Im saying this from the viewpoint of the guy that does the fixing, we can not repair "design flaws", but if you have a bad seal or somethign misaligned I would hope someone fould find it.
However puting a new sunroof in a Tc is no small job like it would be in a Camery or Corolla. You have to strip most all of the interior and the front portion of the roof glass shares the upper portion of the windshield moulding with the windshield. In the past when I was chaseing a rattle in a Tc I was looking at the manual and it appeaerd to me that the windshield would have to come out to release / reinstall the windshield moulding. And I always advise against pulling out windshields if at all possible, most all dealerships sublet windshields to glass shops and I have seen too many come back leaking or with more wind noise than they left with. Also if you do end up getting a new sunroof, most windshield break during removal so inspect your glass afterwards to verify the toyota label to make sure they didnt stick an aftermarket glass in it.