Homemade dry vital wheat gluten/strong flour?
I need a suggestion how to improvise strong bread flour.
My problem is, in my country (EE) there is no high protein flour (max is 10.5%) and there is no gluten supplement either. I sometimes order over Amazon but it is expensive, often unavailable and takes a long time to arrive. And I have to do it over German Amazon, so it's a big hassle every time...
So, can I simply simply make my own vwg (seitan), then let it dry and finally grind it to make the powder that they sell as vwg? If so, how long would you estimate it would last?
Actually, any suggestion how to make strong flour is welcome, really...