I'll talk to Luxire and see if we can do this. The difficult thing would be to get a garment weight natural leather, (most of the stuff I see is made for belts, etc...), and then, finding someone who will dye it. Maybe I could see if @nicelynice
or someone else in Japan will go to that indigo place again! Of course, it would have to be horse or something that has a tight grain, or else there is no knowing how much it might shrink, and how. maybe heavy steer would work.
This'd be a really cool project, I'm actually going to send a coat away to be dyed soon (using sumi ink, not indigo) - I'll ask them about dyeing leather when I do. Maybe start with a natural belt. Could possibly inquire about sourcing horse leather from shinki, make an entirely "Made in Japan" jacket. I personally think an indigo horse type 3 would be killer