I would suggest you look through the commissioners in the marketplace
and see if you can find someone you would like to hire to make your costume. Look around, find a few that you think you like, and message them for quotes. You can also view the commissioner review thread
to see what kind of experiences buyers have had with certain commissioners.
Or you can just post in the commissions: wanted
section and commissioners who are interested in the project can contact you. Either way, head over that way!