Looking for a sharpener wheel

I have a Makita 9820-2 electric sharpener. I bought it about 16 years ago along with my first planer, used it a few times, and even though it does a very good job, I put it on the shelf because it sharpens about as fast as grass grows. The problem is it has a 1000 grit stone, which does a great job honing, but takes forever to get nicks out. Now that I am getting quite a few machines with blades that need to be sharpened regularly, I need to start doing it in house again, but if I have to pay someone to spend all day sharpening blades, that is defeating the purpose. Does anyone know where to get a “rough” grit stone that will sharpen quickly and fit this sharpener? If not, can anyone recommend another sharpener that can sharpen blades quickly? I looked at the Delta 23-710, but it has a 1000 grit stone also, and I can’t find a rough grit stone for it either.

-- David, Southern Indiana, http://www.freedhardwoods.com