I believe they are all deciduous, meaning ( of course) annually deciduous - so they need to be managed to go into rest, after dropping their leaves. The usual slight problem with these plants, is keeping them from either rotting or shrivelling up whilst resting, and when to start watering again. I only have them on my wish list . They don’t appear on any dealers lists I see. Even Ecuagenera who list a couple of thousand (mostly) American species don’t list even one.
Maybe take a trip south with a big sponge bag ? Orchid Mall will give you a few names.
Hey now, Mr. Orchid CITES policeman, that was just a joke.....