I have an Apple DuoDisk drive, that came with the Apple IIe, but it doesn't seem to work. I want to connect it together with the Floppy Emu for easier diagnostics, so I decided to build the Apple II DuoDisk Floppy Emu adapter by ThorstenBr:
https://github.com/ThorstenBr/FloppyEmuDuoDiskAdapter
Since PCBWay sent 10 PCBs, I might have gone a bit overboard with the parts order. 😅 Hope I can sell some of these to recuperate some cost or at least give a few away to others who need it.