As you know, there aren't very many websites that sell pastel paper that is already mounted. If they do, then you know it is very expensive. The alternative is to buy the paper and take it to a framer to have it mounted. Again, this is a very expensive process, takes many steps, and is time-consuming.
We started this website to give artists a convenient and less expensive alternative without sacrificing the quality you and your clients would expect. We use museum grade Wallis pastel paper, UART pastel paper, Fisher 400 paper, Premier Pastel paper, acid-free foam core, conservation board and acid free dry mounting tissue in our substrate. They are made in sizes that will fit standard frames.
Please try them and let us know what you think.