Detailing seat

Im looking to get a nice detailing seat. Ive looked at the rolly seats that you sit on with no back support, i need one WITH the back support. I guess my ideal seat would be something similar to a lawnmower seat somehow fit onto a box that could store a few supplies with the rolly wheels. Anyone have something similar to this or know where I could get this? I know it would be pretty high priced, so is there anywhere I could get those parts myself and make it?
 
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