I'll see what I can do. Give me a list of the ingredients you're most likely to need, sorted from top priority to bottom priority, and I'll get you whatever I can lay hands on. Some things are easy -- scales, shed claw casings, whiskers from the Hebridean Black -- and some things are much, much harder, such as anything that can only be harvested after the dragon's death. If you think you'll need powdered Longhorn horn, for instance, tell me now so I can be on the lookout.