Well met, and welcome to the forum!
Are all of the banners being made by the same people/company, or are you getting them from a variety of places? Most of the gonfalons and banners we've seen talked about here on the forum were considerably less expensive, but are often not made to highly rigorous standards of precision, and typically have the charges painted, rather than embroidered or appliqued. So I'm curious as to the construction method and the like that you've chosen to pursue.