I have two 3 cubic foot sealed enclosures. One has a Tumult II. The other is empty. (No missile silos for me

)
Anyone have a Tumult in excellent condition they want to sell?
If not, what US made driver would you guys recommend to go with the Tumult.
I am using a BFD, a BASSIS and a bridged Cinepro 3k6SE that puts out about 1,400 watts into 4 ohms. I am using about 9 dB boost with the BASSIS and get pretty decent output down to 18 Hz or so. But would like to put something in the other enclosure.
I was hoping John of Acoustic Elegance was going to come out with a high excursion driver but all I have seen is an IB offering. I keep hoping someone will come out with another driver in the Tumult class.
I nearly pulled the trigger on a LMS driver, but am afraid I don't have enough power to drive it.