Fitting Blades to an Arbor

Are there inserts to adapt twelve inch table saw blades, most of which have a one-inch hole, to fit a five-eighths-inch arbor?

Tim Inman: There may be, but don’t be pennywise and pound-foolish. Get the right blade for the best results. An out-of-round blade riding on a sloppy insert bushing will be better than an axe, but it will never do fine work.