Where can I buy bales of straw within far west Texas?
Answers: Any local feed store should own them, if not they can direct you to someone who does own them.
There are many horse keeper in Odessa and Midland. Stop by one and ask where on earth they get their straw.
El Paso nouns has lots of cattle and milk cows. Stop by one and ask.
Or look within the telephone book for nurture stores.