Hi,
Contact your nearest dealer. If you do not know who that is use the dealer seasrch on the White's website.
Your dealer may not know what a TDI is, and may not be able to get one.
White's has only mentioned the TDI on one page of one flyer sent out and so some dealers may have missed it, especially if they are not into pulse induction detecting themselves. If a dealer has not had any prior experience with these types units White's may actually want to get them trained first before allowing them to sell the units. The fear is of them being sold as some kind of new coin detector. Yes, the TDI can find coins, but not in any way that any casual type coin hunter would take to. It is intended more for hardcore detectorists who simply are not able to get goods with the more common detectors available today.
The unit is not yet in full production and since it is intended primarily as a nugget/beach/relic detector the first units went out to dealers who tended to sell more of those types of detectors. Especially any dealers with prior pulse induction experience. As far as I know the initial 200 units have been built and distributed and the unit will not begin rolling off the production line in quantity until late August or early September. There are still a few new units floating around but they are very hard to get. I just got a new unit last week but it was long since pre-sold before I got it. I have no idea when I might get another, and it is already sold. As is the one after that...
Steve Herschbach