For sale is one miter gauge from a vintage 8" Sears Craftsman table saw.  This does not have the positive stop at 90 degrees and 45 to the left and right.   The shaft is just under 16" long.  It's made for a miter slot 3/4" wide and 3/8" deep, so will work for most Craftsman saws.

There are several of these, all fully functional, some painted gold, the rest gray.  Unless you specify which color you want, you'll receive the one with the least rust on the shaft.