Once upon a time, many years ago, a fellow made his own TS 55 insert for the MFT and sold them in the US. One dealer even carried them for a short time. Even though I raised issues of liability I almost ordered one (something about passwords irritated me at the critical moment). I sometimes wish that I had.
The main response to this fellow's efforts were comments about waiting for Festool to bring the official TS 55 CMS product to the US. Oh well, waiting for Festool seemed like a good plan at the time.