I want to make a purchase from this company, but they hardly have anything I want in stock. Therefore, my question is this: Can I place an order from them and have them fill my order before shipping it out? I know that the liklihood of everything being in stock at once is slim. Therefore, I would rather make my purchase now so that they can start filling my order, even if it doesn't fill and ship for months. I only want to pay one HAZMAT and shipping fee. Has anyone done this with Powder Valley or other companies? Thanks.