Quoted from CactusJack:Not sure if its the same seller originally linked to (clicked on the link and it wanted me to sign up for something) so I just did a Amazon search. Here, they are 100 for $6.22 shipped (other quantities also available). Smaller is okay since I chop them up into 3/4" squares anyway.
amazon.com link »
Thanks for the heads-up. I ordered 100 from here.