I got the Eze-lap plates from Amazon. They were quite a bit cheaper than the DMT Plates. Also, I found the green compound (Porter Cable brand) at Lowes for about $3.00. I am amazed at the results with Paul’s method. I had always used a hollow grind and water stones and micro bevel and was never quite satisfied with the results I was getting. Now I am getting whispy, thin shavings with my planes including the cheap newer model Stanley that I never could get tuned up just right.  Sharpening doesn’t seem like such a chore anymore.