Can't speak to where to buy it. Also, I don't own one. However, I have had a few of my non-Fiddleback knives re-profiled by Josh at Razor Edge Knives. He uses a WE, and does great work. I am sure that the tool is only part of the reason Josh does such good work, but he really loves his WE.
Here is a video of him using the WE to re-profile and put a mirror edge on my ZT 0550.
http://www.bladeforums.com/forums/showthread.php/1265034-Super-polished-edges
Edit to add - I have started stropping all my fixed blade knives and really like the edge I am able to create and maintain.