After looking at the availability and prices for the amount I need, I realize I'm just better off to buy a saw and cut my own. I'll pick one of those out next week and get it ordered.
Note that if you are making big stacks or piles of 2x4s etc, only the top ones you really see need to be spot on. For instance if you were making a big pile, you could put a big block of wood in the middle and just nice 2x4s around the 3 sides of it. You could even just have ends as the front.