Garden Roller Stool Toolbox and Seat – Ability Superstore
Amazon.co.uk: Mechanics Stool On Wheels
Rolling Toolbox Stool @ SharperImage.com
Performance Tool W85024 Drawer Creeper Rolling Work Seat with Tool Box for Mechanic Garages and Workshops, Black, 16x9-inch Seat : Amazon.co.uk: DIY & Tools