Well if you've found a cheap supplier share it with the rest of us! hee hee that one site I posted was the first to pop up on Google, $.50 a pop seemed awfully high to me, but haven't seen them advertised much cheaper, that's why a $10 investment in materials seemed well worth it.
But making your own rock is really pretty cool. My first couple batches have been in the tank for around a year or so now and can't tell the difference between the handmade and other LR, except for some of the cool shapes/caves and stuff I made. Next on the hit list is to make some huge shelf rocks.