There once was shop in Woolwich, S.E London, in the 60`s which went under the name of SKILLMANS. It sold just about everything the home and garage handyman wanted but most importantly in small amounts if required. Nail, brads, screws, nuts and bolts, in every gauge, half a dozen at a time in little brown paper bags, metal sheets of all sorts and to your particular dimensions, (e.g. 20"x 12" would constitute no problem), every hand tool and workshop implement you could imagine. I`m sure you get the picture.
Not any more!