Palight ProjectPVC 24 in. x 24 in. x 0.118 in. Foam PVC Yellow Sheet 158206 - The Home Depot
Amazon.com : BAZIC 20" X 30" Yellow Foam Board (Case of 25) (593-25) Color on one side only : Office Products
Yellow EVA Foam Sheets, 30 Pack, 2mm Thick, 9 x 12 Inch, by Better Office Products, Yellow Color, for Arts and Crafts, 30 Sheets Bulk Pack - Walmart.com
Amazon.com : 36 x 48 Yellow Foam Project Board, Pack of 3 : Office Products
Yellow Cross-Linked Polyethylene Foam Sheet - 4 lbs / cu. ft. - 1/4" Thick x 24" Wide
BAZIC 20" X 30" Yellow Foam Board - Bazicstore
Uxcell 12x16" 300x400mm Foam Sheet for Crafts Foam Boards Foam Paper Sheets for Art, Yellow 10 Pack - Walmart.com
Royal Brites Dual Color Foam Board 20 x 30 Neon Yellow Neon Green - Office Depot