My family owns Fischer Bros Excavation, and we do our own fabricating and maintenance. That said I have scads of high carbon scrap steel hanging around, piles of rebar chunks of track pads that have been cut down, used cutting edges. I stumbled across a piece of fresh cutting edge that was trimmed off about 1"x1"x6" I was thinking about trying to make a blade out of, and I will be buying a propane forge