First, let me say I'm new to the forums and a newbie woodworker so I apologize in advance for the elementary question.
Recently, I've been researching cutting mortise and tenon joints with hand tools. It seems that more than one resource suggests pairing the shoulder of the tenon with a wide (1 1/2" or 2") chisel. I don't have such a chisel and what I'm trying to understand is why none of the premium makers manufacture such a chisel. I have found vintage chisels on the auction site, but i didnt see them offered by Lie Nielsen or Veritas. Am I looking in the wrong place? What do you all suggest for paring tenon shoulders?