I don't have any connections for this any more, but I was able when I was vegan occasionally and at a very high price to find leather goods made from animals who died of natural causes. So the big question was, were the purveyors of these goods, who were purporting that the animal wasn't slaughtered, honest? I mean, anyone could stick a label on something that says that.
I also recall a belt that I had, the buckle for which was made from "seasonally shed deer antler."
Ah, those were the days.
Peace.
~ ~ ~ All meetings end in separation All acquisition ends in dispersion All life ends in death - The Buddha