This is a very popular question. You can find pricing information and purchase a US flag that has been flown from the USS Arizona monument by going to the USS Arizona Memorial Museum Association:
A direct link to the flags is:
This is a long URL so just cut and paste it.
You can also go to the main homepage
click on "ONLINE BOOKSTORE" to go to their online electronic bookstore. 'Enter' the bookstore and click on "MISC".
You will find a link to "USS Arizona Flags", click on that and you will get there.
Hope this helps,