Rolleiflex panorama head for thr rolleiflex tele camera

Hello all, The period Rolleiflex literature stated that a Rolleiflex panorama head was available with a special division of the scale for the tele camera.
In 25 years of using Rollei TLR cameras to make panoramic pictures I have never run across one. Does anyone have one of these special heads or know anything about them. Thanks in advance for you help.