Do a Google search or YellowPages search for sign companies in your area; most of them will either stock it on hand or be able to order it, depending what thickness and size sheets you're wanting. Of the places I've called and talked to, most will add it to one of their orders for the cost of the sheet, with no markup for shipping or them ordering it for me and then "handling" it. USAPlastics is a nation-wide distributor but their prices aren't for the faint of heart, lol! Hope that helps and good luck!