You might phone Riley's, in Hookset, NH. It would be a bit of a ride, but since Midway no longer sells reloading components to MA customers, I've found everything I need, at the same prices, at Riley's.
try kittery...althought they wont have the cheap stuff...mostly winchester factory stuff...if you have a friend in aanother state like NH have it shipped there and pick it up
Northeast Trading, North Attleboro
I believe also had plenty when I visited yesterday.
search forum for their sale thread and you can call over there to doublecheck.
Dammit I knew someone would ask that, I can't say for sure but it was a pretty good size box. I dont use the stuff, yet, so by the quick run by it looked like it was maybe 2 boxes of WWP .45 cal. 50 per box high and maybe a little longer. Sorry for the lame answer, I will look a bit better at the box next time I go in there.