A complete answer to this question depends on where you live. IF you are in a city with a federal court library or, lucky you, in a city where a Ninth Circuit Court of Appeals Library is located, you may have a few other options.
In time the briefs may appear on PACER (and a few may be there now, but I’ve not ever seen one there myself).
But for my Oregon readers, here’s the latest on where to find 9th Circuit Court of Appeals briefs, all print sources:
3) See also:
a) PRIVATE COMPANIES in Bay Area: charge and copy
b) FEDERAL COURT RECORDS UNIT: 415-355-7820 (absolute last resort – official – very pricey and time consuming)
NOTE: For other court’s briefs, here’s a great place to begin your search, if you don’t have a law librarian you can ask (!):