Foam Board For Craft Projects Approx Board Foam Blue 20mm 30mm Thickness New | eBay
28green's Collection of Foam Board Inserts | BoardGameGeek
FS-NMS Insert - Folded Space
Amazon.com: BENECREAT 5 Sheets 3mm Black PVC Foam Sheet A4 Lightweight Rigid Foam, Sand Table Model Material Supplies for Mounting Crafts Modelling Art Display School Projects, 11.8x7.8inch : Office Products