Their website certainly suggests they are, but I see no mention of holsters. Perhaps they now concentrate on leather apparel. Their website also suggests in two places that they are in Troy, Montana, and in one place that they are in Gastonia, NC. Perhaps they have more than one location.
This may be a decade to late to help you but maybe someone else is looking for Mountian Leather Works which was bought by www.AwlWorks.com and still makes most of the same leather. Same physical location in Bozeman,Montana 406-587-6261. Call George, website is not complete at all.