Umm , Cheap Koi are usually extremely easy to find. Ask your local pet shop if they can order you a couple , Normally they will be happy to do so. You may have to pay then before they order it ( That what i did with my Leo ) but everything should be fine. They are usually only orange and white but sometimes ( Ask for them ) there is some orange white and black ones.
Are you planning to do a Koi pond ?