I just ordered some boxes of JHP and Pow'rball from Corbon. I actually found the salesperson very friendly and courteous.
Yes, they are a little pricier, but I was also interested in some of their other offerings, all of which they had immediate stock. From a shipping perspective, it just made more sense to order from them for my needs.
If I were just interested in Pow'rballs, I would probably have just ordered from wilsoncombat.com.
the range here stocks them. its not cheap ($20 per box) but it is my carry round and I don't mind paying a premium on high quality defense ammo. I actually got stuck with a few boxes of "old stock" PowRball. From what I was told the stuff was for gun writers to review...strange how the distro got it. It was made back in Feb 2002. It doesn't have that "crimp" and the polymer ball looks different... oh and the box is the standard looking CorBon box with a sticker covering the side...
Responsible Shooter also carries it at a fair price.