FWIW, I have never been aware of John Janowitz (AE owner/builder) having issues with any TD designs. All the manufacturing delays, supplier issues have been with the AV series subwoofers only. John might have limited time to build the TDs but they have always been available, atleast I thought so.
I do know that Wayne Parham (Pi Speakers) uses the TD series drivers so the supply and warranty exists.
The Eminence drivers are nice ( I have a couple ready for the SEOS-12 waveguide project) but I was wondering if you went with the ultimate 12" design. Which in terms of measurements is the TD12M driver (incl. my listening tests (100% subjective to me