PVC Foam Board - White - 3/4 inch thick - various sizes – Falken Design
Foamular 250 3 in. x 4 ft. x 8 ft. R-15 Scored Squared Edge Rigid Foam Board Insulation Sheathing 9GB - The Home Depot
Amazon.com : CreGear Foam Board 20 x 30 x 3/16", 15 Pack White Poster Board Lightweight Signboard Foamboard for Crafts, Framing, Art, Display, Presentation : Office Products
Foam Board Insulation 3 in x 4 ft x 8 ft R-14.1 GPS HalfBack
Amazon.com : 30 Pack White Foam Core Board 20 x 30 Inch Foam Core Backing Board Sheet 3/16 Inch Thickness Polystyrene Poster Board for Presentations, Signboards, Arts and Crafts, Framing, Display, Projects : Office Products
Amazon.com : Office Depot Foam Boards, 20in. x 30in., White, Pack of 3, 26811 : Office Products
FOAMULAR® 250 3 in x 4 ft x 8 ft R-15 Scored Squared Edge
Amazon.com : Colarr 10 Pcs Exact Thick Foam Board 20 x 30 x 3/4 Double Sided White Poster Board Foam Core Board for Mounting Signboard Crafts Framing Modelling Art Display Presentation School Projects : Office Products
Amazon.com : 20Pcs White Foam Board 14 x 11 inch White Poster Board 3/16" Thick Foam Core Board White Foam Backing Boards for Crafts Poster Making Art Presentations : Office Products