If you are looking for low cost fiberglass cloth, and live in the United States, perhaps you would be interest in some of the products sold by Thayer Craft.

I tried to get them to ship some to me in Canada but they don't currently do business out of the "lower 48". I have absolutely no connection with them and have not tried their products since they won't ship to me but I have read about someone using and liking one of their lightweight cloths.

Glen in Baie-St-Paul.