Any information on this crank pulley?

I have this three-grove crank pulley for a 273 with a rubber damper installed between the pulley. This is a single belt A/C pulley.

Being almost 60 years old, I'm concerned that it will start to slip when running the water pump, p/s pump and A/C compressor.

Does anyone know a direct replacement with perhaps a stamped three groove pulley without the rubber buffer?

Thanks