If you have an extra 589 laying around you can get this thing...
You can get the parts separate and if you are handy you could rig one up yourself for the cost of 1 of the wheels and some of the compound for turning tools, He says on the video you don't want to use the finer white compound and only the coarser one. Therfeore you could get a "straight edge" wheel and some green compound and put it on a1450 or 1750 motor and viola. I was going to try that before I got the worksharp as a gift.....sharpening problems solved.
It looks like it is only available at Woodcraft.