I found a new DW-8900 (MRG-100) in a store! | WatchUSeek Watch Forums
Amazon.com: Lijinlan Strap Compatible with Casio G-Shock, Men Nylon Replacement Watch Band for G-Shock DW5600/GWM5610/DW6900/DW9052/GW100/GA100/GD120/GA400 : Clothing, Shoes & Jewelry