All you can do for the coat is shop around really then.
For cheap itd be ebay listings and shopgoodwill.com postings.
For the headgear I have a link at home I can post in a few hours (im at college)from a superhero costuming board Im on. Someone made a Firestorm whos headgear tutorial design should work for this cosplay.
The Prince of Persia 100%, Crashman 100%, Terry Bogard 100%,Deadpool 100%