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Well, malt vinegar is a product of ale making. I'm sure that anywhere making beers, ales, or similar drinks has it to some degree.
However, historically, malt vinegar being made at scale started in England. It spread from there. So there's really not much of it outside of European cuisines at all, and what there is tends to be very recently adopted. Iirc, japan does make some use of it now, but it isn't a traditional thing.
So I don't think using that avenue of finding it is going to work. It really is mostly a UK and US produced item. I only did a cursory search, but I couldn't find any that aren't made I one of the two, but because it was a cursory search, I don't wanna say that it isn't possible.
As much as it sucks, you may have to go through something like amazon unless one of the restaurant supply places in your area happens to have it. You'd likely have to buy at least a gallon, but you'd have it.