Blank 9 x 13 Plastic Clipboard Box with Storage-Purple | Folders.com
Amazon.com: Mind Reader Apprentice Collection, Storage Clipboard with Low Profile Clip, Letter Size, Bottom Hinge, Set of 6, 9.25"L x 13.25"W x 1"H, Assorted Colors : Office Products
Clipboard with Storage Case Plastic A4 Clipboard Storage Box for School & Office | eBay
Mind Reader 6-Pack Clipboard in the Notebooks & Notepads department at Lowes.com