http://www.luckygunner.com/ may have some .22 ammo. Or try http://ammoseek.com/ or http://www.ammoengine.com/. The last 2 are kind of like kayak.com except for bullets.
I’ve taken to placing ‘back order’ orders with Midway ... you get the shipment first when ammo comes in. Potterfield sold American Eagle 38 grain HP 400 count bricks (their boxes are now 40 rounds) for $19.95 the last purchase I made a month ago. A nickel per round is still reasonable, when you can get it. I have stopped buying anything from the Cheaper Than Dirt scammers.