[TenTec] Bird Termaline 50 Ohm load - 82A - Need adapter

[Bill Mellema]

I have a friend who just bought a used Bird 500 watt Termaline 50 ohm load, model 82A.  It has a coaxial connector as shown in the photo linked below.  He needs an adapter to adapt this connector to type N (or UHF) like the one sitting on the table in the photo.  (The photo is not of the 82A that I have but it illustrates the connector and the adapter I need.)  The connector on the load measures 1.125 in. diameter across the threads.  The QC type connectors now used on Bird products is not what is used on the model 82A.

Does anyone know where he can purchase an adapter?

Thanks In Advance,

Bill N3WM