What happened, Mario?
FYI there are 3 Tang Band module sizes currently in stock that cover most installs, the smallest T0-2008S, T1-1925S and T1-1931S. And they are available in single-unit quantities. Others such as the T1-1828SD which I plan to fit in modified 2R P&D F-units and the Mario's 1942S are still in stock.
Just a reminder, these are 4 ohm speakers. If a decoder is rated for 8 ohms, you can put a 4 ohm 1 watt carbon resistor in series. This will somewhat influence the frequency response.