TSB for what? Strut noise? There isn't one. The only TSBs that exist are for the steering rack, DCT, and MFT. Additionally, there's the recall for the windshield wiper motor wiring. No TSB for suspension, not that I know of, or that anyone has actually acknowledged.
Anyways, the springs are installed, noise is 95% eliminated, and the car handles much better. I'm happy. Should've done this a long time ago.