Sorry, I’m not too experienced with adding links, but if you do a search for “power planer” on E-bay, near the bottom of the list is this beast of a planer. Looks like it could work. I’m not seriously considering buying it, but wondered if anyone here has ever used one or something like it. I’ve never seen anything other than the 3 1/4" varieties. Does anyone sell blades that long? I mean, how does that work?