I found a supplier using the links for Mazuri someone posted on this thread. It's actually ON my commute to work, so I can pick up feed any of 5 days a week, it's a family owned feed store, instead of a big chain like Tractor Supply, and the guys in the warehouse who load the feed up for me call me "ma'am" and tip their hats at me.
Oh, and the Mazuri is $22/bag and they ALSO offered to order me a different rodent feed called "16-5"? that's only $14/bag.
If you can find a local feed store that carries Purina, they can probably do an order for you.
Did I mention, the country boys who call me ma'am? Cause that counts a lot too.