I do not know, but Selmer currently makes only two baritone mouthpieces: the S80 and the S90. Not only no Concept, but also no Soloist and nothing in the jazzy vein. Judging by the relationship between S80 and Concept prices for the alto and tenor models, a Concept mouthpiece for baritone sax probably would have a street price of close to $400. Would you be prepared to pay that? Maybe so, but I doubt that there would be very many other classical bari players with big budgets who wanted a Selmer mp yet didn't find either the S80 or S90 adequate.