I agree that sourcing your own leather might be problematic, especially if the maker isn't familiar with it.
I prefer to find a jacketmaker who will create the jacket I want and then choose from their options. I think you'll end up with a better jacket in the long run.
I prefer to find a jacketmaker who will create the jacket I want and then choose from their options. I think you'll end up with a better jacket in the long run.