The metal shop at the vo-tech would keep the trouble makers in the high school class busy with a couple of big bastard files and a rail road rail. You could do the same, or use that angle grinder of yours...harbor freight has 10 packs of metal grinding disks (you want the grinders for this, not the cutters) on sale for under $10 regular like... Go to the junk yard or wander the rail bed for a small cut off piece of rail...CSX does prosecute around here, but alot of those rail guys that repair the tracks will give you stuff, like small cut off pieces of rail. I think Jim Hrisoulas suggested making one out of rail and how to harden the surface?- can't find where his books are here at the house or I'd tell you for sure. The rail isn't a Great anvil, but it is cheap and can be shaped to what you need.
The "Lively Forge" video shows Lively himself using a bar of steel for an anvil, anchored into the ground. When I was 12ish I used a piece of steel bar about 2" thick X 6" wide that had a big hole on one side. I hammered a couple of 3/8" U's into a tree stump thru the hole in the steel. It flopped some, but I was little and banging on red hot rebar- made some very ugly armadillo swords. Start hammering on something.
But to answer your question, it seems like the linked anvil would be a great project, after you do something about those knives...