First off. The pleather makes it waterproof, while it is a bit shinier than in ASAS, it's flows quite beautifully. Second, since I assume you mean Abbyshot.com, there are two options for hoods, the Oathkeeper (gigantic in a Ripley-is-going-to-come-and-kill-you-you-Alien way) and the Oblivion, which is smaller and much shorter.
If you can afford it, go for Abbyshot, while it's not the most accurate (but accurate enough), it's a functional and great coat. If not, find a pattern and alter it, combining patterns if necessary. But, it is hard, as khamryn (who made a very excellently accurate coat) has said.
If you have access to wood-working materials, your best bet is to make it out of wood. There are tones of threads about keyblades, do a search and you'll hit upon one that has great tips on making one.
"Nah, it's not mine."