MAKE YOUR OWN PATTERN WIRE WITH A ROLLING MILL
A rolling mill. They use much, much less energy than grinding, so hand-cranked should be OK. They don't have wear surfaces like most mills, and are mechanically fairly simple. Rolled fine enough, sourdough can be made without any grinding. Rolled a little coarser, you can make hot cereal...if I understand it correctly, rolling your own fresh and coarse enough has all the benefits of steel cut.