Butterick #6844 could be used for both coats. Easily, it should be perfect for Anderson, and with the addition of lapels, Arucard. If you are not any good at altering patterns, I think there's a Vogue coat pattern that's similar to Arucards.
Arucard's hat... I think you should be able to find a base to work from. Otherwise, since it's a relatively simple design (all flat surfaces), making a base out of craft foam shouldn't prove too difficult.
Try searching other Hellsing threads as well. I think this has been brought up a few times.
Clothes make the man.
Naked people have little or no influence in society.