Ribbon tweeter for dipole speaker

Hi folks, I would like to ask which ribbon (and AMT) tweeter can be used for dipole application? It will only need to cover from 3500-4000 Hz up with LR-4 acoustic crossover. For planar I know the B&G Neo3 and its replacement PTS-2522, Aurum Cartus ATS2560. But which ribbon/AMT driver, there is so little information about. The only one I know is Mundorf's ones like AMT17D2.2, but it is very expensive. Do you guys know anything else?