The sort of thing I mean is a plastic clip-strip that slides onto the edge of and grips/holds together several sheets of paper whereby it forms the spine/binder of a document. Does anyone know where I can find one at least 40cm long, preferably black or white although navy or clear would do ?
You'll have a problem checking them out in a Staples store, as Staples closed all of their UK stores at the end of 2016. They were sold to Hilco, who then traded from former Staples locations under the Office Outlet name. However Office Outlet went into administration in March of this year, leading to store closures. (Staples UK still has an online presence but only stocks spine bars in the standard A4 size).