Where Do You Buy Sintra??? - The Custom Saber Shop Forums.26 Feb 2010 . Hey i was just wondering what name brand stores (like Lowes, Home Depot, ect) carry Sintra PVC Sheets? For anyone out there who doesnt know what im talking about, think plywood sheets, but instead of wood its PVC/Composite. im trying to make a custom sith helmet, and i know how to make it, what.