Black Cardstock - 12 x 12 inch - 100Lb Cover - 25 Sheets : Amazon.co.uk: Home & Kitchen
American Crafts 12x12 Precision Cardstock Pack - Pastel — Papermaze
Black Cardstock - 12'' x 12'' 85lb 30 Sheets Cover Card Stock Paper for Scrapbooking, Crafts, Business Cards UAP05BK : Amazon.co.uk: Stationery & Office Supplies