Komatex 24 in. x 36 in. x 0.118 in. Black Foam Project Board (5-Pack) 41655106 - The Home Depot
Amazon.com : Union Premium Black Foam Board 16 x20 x3/16" 10-Pack : Matte Finish High-Density Professional Use, Perfect for Presentations, Signboards, Arts and Crafts, Framing, Display (Black, 16 x 20 x 3/16") :
Foam Core Backing Board 3/16" Black 12x24- 5 Pack. Many Sizes Available. Acid Free Buffered Craft Poster Board for Signs, Presentations, School, Office and Art Projects - Walmart.com
3/16" Black Buffered Foam Core Boards :48 X 96 - BOXFORLESS.COM
Elmer's 20" X 28" Presentation Board - Black : Target
Amazon.com : AKOLAFE 30 Pack 10x8 Inch Foam Boards, 5 mm Thick Foam Core Board 1/5 Inch Black Foam Sheet, Black Polystyrene Poster Board Signboard for Presentations, School, Office & Art Projects : Office Products
Amazon.com : 20 Pack 11x14 inch Black Foam Boards, Foam Core Backing Boards 3/16 Inch Thick Double : Office Products