I saw some boxes of Federal (525 or 550rds, can't remember) at a Walmart in Kennett Square PA last week. I typically don't shop there so this is not something that I normally follow. I just happened to notice that they had some because I had paid about $1 more for the box (a 525 "value pack") that I bought at Kittery Trading Post in ME the week before (for $16). The Walmart had a full shelf and Kittery had an entire island display of it- so it is definitely available.
Unless you need 5000rds to shoot this week, just wait for it to show up in your neck of the woods (point being, the whole country is not sold out).