Meprotal 2pcs 6-Ring A6 Notebook Metal Binders Binder Mechanism Replacement Kit for DIY Loose Leaf Book DIY Photo Album Paper Storage Folder (Bronze) - Walmart.com
3 Pack of A5 Notebook Mechanism Replacement Kit, 20mm 6-Ring Metal Binder Mechanisms for Loose Leaf Notebook Planner Binding Accessories, Screws Included (Nickel) - Walmart.com
Amazon.com : Wealrit 5 pcs A8 3 Ring Binder Mechanisms Replacement Kit,Silver Metal Ring Binder Mechanisms for Photo Album Diary Notebook : Office Products