I've just gotten back from my local Staples. This office supply chain is one of the few retail partners Amazon still has left, and it turns out that is a very good thing. Now that Target and Walmart have both removed the Kindle from their shelves, Staples doesn't have to compete for the limited supply of a very popular ereader.
My local store (Woodbridge VA) had quite a few KPW in stock, so much so that they didn't even have to check when I called earlier. What's more, all the stores in my area have this ereader in stock (though one did show the supply as being low).
But that's not all. I spot checked other stores on the Staples website by looking up my old addresses, and all of the locations I checked showed that a number of stores within a reasonable driving distance (of my old addresses) had the Paperwhite in stock.
And Staples was not the only chain which had this ereader. A few Best Buy stores still have stock left. Check their website to see if a store near you has one (you can also order it online).
So if you want a Kindle Paperwhite, you can buy one. It might be a little difficult to acquire but it can be done.