DJ - I've got a bunch of small scraps that would be perfect for 1-1/2" squares. If you're interested, I can go through them and weed out any duplicates, and see what they weigh. I could use some 5.5" squares, or pieces big enough to cut 5.5" squares from. Maybe we could trade weight-for-weight? It'll probably be Monday evening or Tuesday morning before I have a chance to go through them.
Edit: Actually, I'll need to send some extra, to make it fair, since these scraps are not already cut down to 1-1/2" size. There will be a little bit of waste after they're cut down, but not a whole lot.