I did know about hair canvas, I have used it in the past. The problem I am having is that I am having problems getting it locally. I went to my local "fabric store" (Hobby Lobby) last night, the lady there knew what I was asking about but they do no carry it and they can not order it. She said that the closest store that MIGHT have it is in a city about a hundred miles away.
I was reading in the kilt article in Threads magazine and the author suggested either hair canvas or linen folded in half. I have linen, silk, wool, etc. just no hair canvas.