A3 ring binders frosted polypropylene (Portrait and Landscape) from £3.45 each + VAT.
Amazon.com : Elba PVC Ring Binder Landscape A3 Black : Office Products
Elba Vision Ring Binder PVC Clear Front Pocket 4 D-Ring A3 Portrait 30mm Black Ref 400009729 [Pack 2] - ASAP Distribution - Film and TV Consumables Suppliers
Elba A3 Ring Binder Black Portrait - Kingswood Office Supplies