Cellular PVC can be cut, screwed, routered and milled just like wood. I Elite Trimworks
PVC Plastic Sheets : TAP Plastics
Expanded Foam PVC - Polymershapes
PVC Plain White Sheets, Thickness: 8mm, Size: 8 X 4 Feet
Amazon.com: Mega Format Expanded PVC Plastic Sheets - 10" X 10" Rigid White Sheet for Crafts, Signage, & Displays - Sintra, Celtec PVC Board - Waterproof for Outdoors Use - 1/8" 3mm
PVC Plate Board 23x28mm Thickness 6mm 8mm Plastic Hard Sheet for Electronic Equipment Etc - AliExpress
PVC Sheet, Rod & Shapes Category | PVC Sheet, Rod & Shapes | Type 1 Sheet, Clear Sheet & Expanded Sheet | U.S. Plastic Corp.
White PVC Sheet – Clearly Plastic - Cut To Size Plastics
1/16" x 12" x 12" Gray PVC Sheet | U.S. Plastic Corp.