White Foamex PVC Foam Sheet Cut to Size Foam Board 3mm (210 x 297mm (A4), 1) : Amazon.co.uk: Stationery & Office Supplies
Sankeqi White Standard Foamex PVC Free Foam Board for Printing and Angraving 1-12mm - China PVC Free Foam Sheet, Low Density PVC Foam Board | Made-in-China.com