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 : Amazon.co.uk:
16 Pack A3 Foam Boards Black Foam Core Board 3/16" Thickness Polystyrene Board Poster, Black Foam Board for Crafts, Presentation and School Projects on OnBuy
Gilman Brothers ELMER'S® ENCORE™ BLACK ACID FREE 40X60 FOAMBOARD 3/16 INCH THICKNESS, AFB/B4060/16 FOME-COR® with ENCORE® TECHNOLOGY
Foam Boards – igp323.com
White Foam Board 3/16 Four Pack Rectangle and Circle - Etsy UK