Two Cool Tri-Fold Poster Board, 36 x 48, Black/White, 6/Carton - Zerbee
Amazon.com : Trifold Poster Board 36" x 48" White Presentation Board Science Fair Display Boards - for School, Fun Projects and Business Presentations - by Emraw : Office Products
Eco Brites Two Cool Tri-fold Poster Board, 24 X 36, White/white | Round Eye Supply
Amazon.com: BAZIC Trifold Presentation Board 36" X 48" Black, Tri-Fold Corrugated Poster Boards, Cardboard for Display Boards Science Fair Art Project, 24-Pack : Everything Else
Elmer's TriFold White Corrugate Display Board, 14" x 22" - Walmart.com