They make these color-sorter contraptions that will supposedly sort out almost all of the ergot and uh... fusarium, I think it's spelled? But our combine is very old and doesn't do anything but thresh. :P

They make these big table-things that vibrate that will sort the grains, too, but they don't work very well for removing ergot. They get probably only half of it would be my guess.

I've made cornmeal with a coffee grinder. It works well for that, but it won't grind grain into as fine a flour as you are probably used to. But if you don't mind a rough flour, it works ok.

A certain amount of ergot won't hurt you, and I think it's only repeated exposure that can cause bad health problems (but don't take my word for that lol). I /think/ the buyers will accept 1:100 or better ratio here, but I am not 100% sure. That's something my old man has always handled.