Amazon: Thin Metal
10 Pcs Metal Strips Metal Shim Stock Metal Sheet Metal Shims Gap Filler Trim Strip 12\'\' Length x 1\'\' Width x 0.02\'\' Thickness (Stainless Iron) 3.6 3.6 out of 5 stars (14) 4Pack 5052 H32 Thin Aluminum Sheet Metal 6 x 12 x 0.012\" (12Mil) Aluminum Plate Covered with Protective Film, Rectangle 0.3MM Thin Aluminum Metal Plate for Crafting, DIY