This might help. You have to scroll down a ways to find the 141 stuff. The one you want I think is:http://www.glkinst.com/cables/hp_cables.htm
The one you want I think is:
HP 8443A/B 100 KHz to 110 MHz Tracking Generator to 141T/8553B Display Aux. A (standard length 18 inches).
Order P/N 08443-60009 = $149.00